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Finding the Fourth Proportional to 85,491.50, 128,168.07 and 35,609.07

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Solution

The fourth proportional to 85,491.50, 128,168.07 and 35,609.07 is: 53,384.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,491.50 : 128,168.07 = 35,609.07 : x
  2. Step 2: Convert to fraction form
    85,491.50/128,168.07 = 35,609.07/x
  3. Step 3: Cross multiply
    85,491.50x = 128,168.07 × 35,609.07
  4. Step 4: Simplify right side
    85,491.50x = 4,563,945,602.85
  5. Step 5: Solve for x
    x = 4,563,945,602.85/85,491.50
  6. Step 6: Final answer
    x = 53,384.79

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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.