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Finding the Fourth Proportional to 87,049.54, 120,082.53 and 53,049.79

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Solution

The fourth proportional to 87,049.54, 120,082.53 and 53,049.79 is: 73,180.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,049.54 : 120,082.53 = 53,049.79 : x
  2. Step 2: Convert to fraction form
    87,049.54/120,082.53 = 53,049.79/x
  3. Step 3: Cross multiply
    87,049.54x = 120,082.53 × 53,049.79
  4. Step 4: Simplify right side
    87,049.54x = 6,370,352,999.17
  5. Step 5: Solve for x
    x = 6,370,352,999.17/87,049.54
  6. Step 6: Final answer
    x = 73,180.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.