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Finding the Fourth Proportional to 79,793.10, 119,689.65 and 42,338.70

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Solution

The fourth proportional to 79,793.10, 119,689.65 and 42,338.70 is: 63,508.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,793.10 : 119,689.65 = 42,338.70 : x
  2. Step 2: Convert to fraction form
    79,793.10/119,689.65 = 42,338.70/x
  3. Step 3: Cross multiply
    79,793.10x = 119,689.65 × 42,338.70
  4. Step 4: Simplify right side
    79,793.10x = 5,067,504,184.46
  5. Step 5: Solve for x
    x = 5,067,504,184.46/79,793.10
  6. Step 6: Final answer
    x = 63,508.05

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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.