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Finding the Fourth Proportional to 79,442.88, 119,251.52 and 67,115.20

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Solution

The fourth proportional to 79,442.88, 119,251.52 and 67,115.20 is: 100,746.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,442.88 : 119,251.52 = 67,115.20 : x
  2. Step 2: Convert to fraction form
    79,442.88/119,251.52 = 67,115.20/x
  3. Step 3: Cross multiply
    79,442.88x = 119,251.52 × 67,115.20
  4. Step 4: Simplify right side
    79,442.88x = 8,003,589,615.10
  5. Step 5: Solve for x
    x = 8,003,589,615.10/79,442.88
  6. Step 6: Final answer
    x = 100,746.47

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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.