Home / 85,659.35-128,515.31-38,314.27

Finding the Fourth Proportional to 85,659.35, 128,515.31 and 38,314.27

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Solution

The fourth proportional to 85,659.35, 128,515.31 and 38,314.27 is: 57,483.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,659.35 : 128,515.31 = 38,314.27 : x
  2. Step 2: Convert to fraction form
    85,659.35/128,515.31 = 38,314.27/x
  3. Step 3: Cross multiply
    85,659.35x = 128,515.31 × 38,314.27
  4. Step 4: Simplify right side
    85,659.35x = 4,923,970,286.47
  5. Step 5: Solve for x
    x = 4,923,970,286.47/85,659.35
  6. Step 6: Final answer
    x = 57,483.16

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1.5x scale

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.