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Finding the Fourth Proportional to 157,753.64, 217,700.10 and 90,681.64

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Solution

The fourth proportional to 157,753.64, 217,700.10 and 90,681.64 is: 125,140.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,753.64 : 217,700.10 = 90,681.64 : x
  2. Step 2: Convert to fraction form
    157,753.64/217,700.10 = 90,681.64/x
  3. Step 3: Cross multiply
    157,753.64x = 217,700.10 × 90,681.64
  4. Step 4: Simplify right side
    157,753.64x = 19,741,402,096.16
  5. Step 5: Solve for x
    x = 19,741,402,096.16/157,753.64
  6. Step 6: Final answer
    x = 125,140.71

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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.