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Finding the Fourth Proportional to 79,761.60, 119,642.58 and 74,890.08

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Solution

The fourth proportional to 79,761.60, 119,642.58 and 74,890.08 is: 112,335.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,761.60 : 119,642.58 = 74,890.08 : x
  2. Step 2: Convert to fraction form
    79,761.60/119,642.58 = 74,890.08/x
  3. Step 3: Cross multiply
    79,761.60x = 119,642.58 × 74,890.08
  4. Step 4: Simplify right side
    79,761.60x = 8,960,042,387.61
  5. Step 5: Solve for x
    x = 8,960,042,387.61/79,761.60
  6. Step 6: Final answer
    x = 112,335.29

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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.