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Finding the Fourth Proportional to 266,148.38, 399,288.05 and 79,159.88

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Solution

The fourth proportional to 266,148.38, 399,288.05 and 79,159.88 is: 118,759.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,148.38 : 399,288.05 = 79,159.88 : x
  2. Step 2: Convert to fraction form
    266,148.38/399,288.05 = 79,159.88/x
  3. Step 3: Cross multiply
    266,148.38x = 399,288.05 × 79,159.88
  4. Step 4: Simplify right side
    266,148.38x = 31,607,594,123.43
  5. Step 5: Solve for x
    x = 31,607,594,123.43/266,148.38
  6. Step 6: Final answer
    x = 118,759.30

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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.