Home / 85,549,660.80-128,324,491.20-39,491,440.80

Finding the Fourth Proportional to 85,549,660.80, 128,324,491.20 and 39,491,440.80

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Solution

The fourth proportional to 85,549,660.80, 128,324,491.20 and 39,491,440.80 is: 59,237,161.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,549,660.80 : 128,324,491.20 = 39,491,440.80 : x
  2. Step 2: Convert to fraction form
    85,549,660.80/128,324,491.20 = 39,491,440.80/x
  3. Step 3: Cross multiply
    85,549,660.80x = 128,324,491.20 × 39,491,440.80
  4. Step 4: Simplify right side
    85,549,660.80x = 5,067,719,047,414,921
  5. Step 5: Solve for x
    x = 5,067,719,047,414,921/85,549,660.80
  6. Step 6: Final answer
    x = 59,237,161.20

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.