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Finding the Fourth Proportional to 157,380.31, 217,187.31 and 85,760.29

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Solution

The fourth proportional to 157,380.31, 217,187.31 and 85,760.29 is: 118,350.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,380.31 : 217,187.31 = 85,760.29 : x
  2. Step 2: Convert to fraction form
    157,380.31/217,187.31 = 85,760.29/x
  3. Step 3: Cross multiply
    157,380.31x = 217,187.31 × 85,760.29
  4. Step 4: Simplify right side
    157,380.31x = 18,626,046,689.92
  5. Step 5: Solve for x
    x = 18,626,046,689.92/157,380.31
  6. Step 6: Final answer
    x = 118,350.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.