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Finding the Fourth Proportional to 73,116.80, 109,905.60 and 67,587.20

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Solution

The fourth proportional to 73,116.80, 109,905.60 and 67,587.20 is: 101,593.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,116.80 : 109,905.60 = 67,587.20 : x
  2. Step 2: Convert to fraction form
    73,116.80/109,905.60 = 67,587.20/x
  3. Step 3: Cross multiply
    73,116.80x = 109,905.60 × 67,587.20
  4. Step 4: Simplify right side
    73,116.80x = 7,428,211,768.32
  5. Step 5: Solve for x
    x = 7,428,211,768.32/73,116.80
  6. Step 6: Final answer
    x = 101,593.78

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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.