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Finding the Fourth Proportional to 145,288.59, 217,932.54 and 38,672.55

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Solution

The fourth proportional to 145,288.59, 217,932.54 and 38,672.55 is: 58,008.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,288.59 : 217,932.54 = 38,672.55 : x
  2. Step 2: Convert to fraction form
    145,288.59/217,932.54 = 38,672.55/x
  3. Step 3: Cross multiply
    145,288.59x = 217,932.54 × 38,672.55
  4. Step 4: Simplify right side
    145,288.59x = 8,428,007,049.78
  5. Step 5: Solve for x
    x = 8,428,007,049.78/145,288.59
  6. Step 6: Final answer
    x = 58,008.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.