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Finding the Fourth Proportional to 71,934, 99,267.78 and 40,104.84

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Solution

The fourth proportional to 71,934, 99,267.78 and 40,104.84 is: 55,344.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,934 : 99,267.78 = 40,104.84 : x
  2. Step 2: Convert to fraction form
    71,934/99,267.78 = 40,104.84/x
  3. Step 3: Cross multiply
    71,934x = 99,267.78 × 40,104.84
  4. Step 4: Simplify right side
    71,934x = 3,981,118,434.06
  5. Step 5: Solve for x
    x = 3,981,118,434.06/71,934
  6. Step 6: Final answer
    x = 55,344.04

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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.