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Finding the Fourth Proportional to 79,422.72, 119,691.87 and 71,535.12

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Solution

The fourth proportional to 79,422.72, 119,691.87 and 71,535.12 is: 107,805.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,422.72 : 119,691.87 = 71,535.12 : x
  2. Step 2: Convert to fraction form
    79,422.72/119,691.87 = 71,535.12/x
  3. Step 3: Cross multiply
    79,422.72x = 119,691.87 × 71,535.12
  4. Step 4: Simplify right side
    79,422.72x = 8,562,171,327.34
  5. Step 5: Solve for x
    x = 8,562,171,327.34/79,422.72
  6. Step 6: Final answer
    x = 107,805.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.