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Finding the Fourth Proportional to 80,719.80, 121,079.70 and 73,462.20

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Solution

The fourth proportional to 80,719.80, 121,079.70 and 73,462.20 is: 110,193.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,719.80 : 121,079.70 = 73,462.20 : x
  2. Step 2: Convert to fraction form
    80,719.80/121,079.70 = 73,462.20/x
  3. Step 3: Cross multiply
    80,719.80x = 121,079.70 × 73,462.20
  4. Step 4: Simplify right side
    80,719.80x = 8,894,781,137.34
  5. Step 5: Solve for x
    x = 8,894,781,137.34/80,719.80
  6. Step 6: Final answer
    x = 110,193.30

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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.