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Finding the Fourth Proportional to 423,177.88, 634,807.71 and 123,651.61

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Solution

The fourth proportional to 423,177.88, 634,807.71 and 123,651.61 is: 185,489.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,177.88 : 634,807.71 = 123,651.61 : x
  2. Step 2: Convert to fraction form
    423,177.88/634,807.71 = 123,651.61/x
  3. Step 3: Cross multiply
    423,177.88x = 634,807.71 × 123,651.61
  4. Step 4: Simplify right side
    423,177.88x = 78,494,995,381.91
  5. Step 5: Solve for x
    x = 78,494,995,381.91/423,177.88
  6. Step 6: Final answer
    x = 185,489.36

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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.