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Finding the Fourth Proportional to 157,658.80, 217,573.92 and 89,685.56

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Solution

The fourth proportional to 157,658.80, 217,573.92 and 89,685.56 is: 123,768.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,658.80 : 217,573.92 = 89,685.56 : x
  2. Step 2: Convert to fraction form
    157,658.80/217,573.92 = 89,685.56/x
  3. Step 3: Cross multiply
    157,658.80x = 217,573.92 × 89,685.56
  4. Step 4: Simplify right side
    157,658.80x = 19,513,238,856.60
  5. Step 5: Solve for x
    x = 19,513,238,856.60/157,658.80
  6. Step 6: Final answer
    x = 123,768.79

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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.