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Finding the Fourth Proportional to 157,712.28, 217,610.42 and 90,631.32

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Solution

The fourth proportional to 157,712.28, 217,610.42 and 90,631.32 is: 125,052.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,712.28 : 217,610.42 = 90,631.32 : x
  2. Step 2: Convert to fraction form
    157,712.28/217,610.42 = 90,631.32/x
  3. Step 3: Cross multiply
    157,712.28x = 217,610.42 × 90,631.32
  4. Step 4: Simplify right side
    157,712.28x = 19,722,319,610.35
  5. Step 5: Solve for x
    x = 19,722,319,610.35/157,712.28
  6. Step 6: Final answer
    x = 125,052.53

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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.