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Finding the Fourth Proportional to 159,665.20, 220,352.72 and 91,691.08

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Solution

The fourth proportional to 159,665.20, 220,352.72 and 91,691.08 is: 126,542.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,665.20 : 220,352.72 = 91,691.08 : x
  2. Step 2: Convert to fraction form
    159,665.20/220,352.72 = 91,691.08/x
  3. Step 3: Cross multiply
    159,665.20x = 220,352.72 × 91,691.08
  4. Step 4: Simplify right side
    159,665.20x = 20,204,378,877.74
  5. Step 5: Solve for x
    x = 20,204,378,877.74/159,665.20
  6. Step 6: Final answer
    x = 126,542.16

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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.