Home / 85,729.20-128,593.80-35,792.70

Finding the Fourth Proportional to 85,729.20, 128,593.80 and 35,792.70

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Solution

The fourth proportional to 85,729.20, 128,593.80 and 35,792.70 is: 53,689.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,729.20 : 128,593.80 = 35,792.70 : x
  2. Step 2: Convert to fraction form
    85,729.20/128,593.80 = 35,792.70/x
  3. Step 3: Cross multiply
    85,729.20x = 128,593.80 × 35,792.70
  4. Step 4: Simplify right side
    85,729.20x = 4,602,719,305.26
  5. Step 5: Solve for x
    x = 4,602,719,305.26/85,729.20
  6. Step 6: Final answer
    x = 53,689.05

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Similar ratio
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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.