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Finding the Fourth Proportional to 79,720.88, 119,581.32 and 69,456.56

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Solution

The fourth proportional to 79,720.88, 119,581.32 and 69,456.56 is: 104,184.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,720.88 : 119,581.32 = 69,456.56 : x
  2. Step 2: Convert to fraction form
    79,720.88/119,581.32 = 69,456.56/x
  3. Step 3: Cross multiply
    79,720.88x = 119,581.32 × 69,456.56
  4. Step 4: Simplify right side
    79,720.88x = 8,305,707,127.46
  5. Step 5: Solve for x
    x = 8,305,707,127.46/79,720.88
  6. Step 6: Final answer
    x = 104,184.84

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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.