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Finding the Fourth Proportional to 80,053.29, 120,079.78 and 75,181.75

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Solution

The fourth proportional to 80,053.29, 120,079.78 and 75,181.75 is: 112,772.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,053.29 : 120,079.78 = 75,181.75 : x
  2. Step 2: Convert to fraction form
    80,053.29/120,079.78 = 75,181.75/x
  3. Step 3: Cross multiply
    80,053.29x = 120,079.78 × 75,181.75
  4. Step 4: Simplify right side
    80,053.29x = 9,027,807,934.76
  5. Step 5: Solve for x
    x = 9,027,807,934.76/80,053.29
  6. Step 6: Final answer
    x = 112,772.48

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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.