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Finding the Fourth Proportional to 78,806.55, 108,752.89 and 42,996.59

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Solution

The fourth proportional to 78,806.55, 108,752.89 and 42,996.59 is: 59,335.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,806.55 : 108,752.89 = 42,996.59 : x
  2. Step 2: Convert to fraction form
    78,806.55/108,752.89 = 42,996.59/x
  3. Step 3: Cross multiply
    78,806.55x = 108,752.89 × 42,996.59
  4. Step 4: Simplify right side
    78,806.55x = 4,676,002,663.90
  5. Step 5: Solve for x
    x = 4,676,002,663.90/78,806.55
  6. Step 6: Final answer
    x = 59,335.20

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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.