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Finding the Fourth Proportional to 79,538.85, 109,764.35 and 43,729.11

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Solution

The fourth proportional to 79,538.85, 109,764.35 and 43,729.11 is: 60,346.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,538.85 : 109,764.35 = 43,729.11 : x
  2. Step 2: Convert to fraction form
    79,538.85/109,764.35 = 43,729.11/x
  3. Step 3: Cross multiply
    79,538.85x = 109,764.35 × 43,729.11
  4. Step 4: Simplify right side
    79,538.85x = 4,799,897,116.58
  5. Step 5: Solve for x
    x = 4,799,897,116.58/79,538.85
  6. Step 6: Final answer
    x = 60,346.58

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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.