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Finding the Fourth Proportional to 90,207.56, 124,404.21 and 77,456.75

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Solution

The fourth proportional to 90,207.56, 124,404.21 and 77,456.75 is: 106,819.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,207.56 : 124,404.21 = 77,456.75 : x
  2. Step 2: Convert to fraction form
    90,207.56/124,404.21 = 77,456.75/x
  3. Step 3: Cross multiply
    90,207.56x = 124,404.21 × 77,456.75
  4. Step 4: Simplify right side
    90,207.56x = 9,635,945,170.90
  5. Step 5: Solve for x
    x = 9,635,945,170.90/90,207.56
  6. Step 6: Final answer
    x = 106,819.70

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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.