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Finding the Fourth Proportional to 87,062.94, 120,044.30 and 80,606.79

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Solution

The fourth proportional to 87,062.94, 120,044.30 and 80,606.79 is: 111,142.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,062.94 : 120,044.30 = 80,606.79 : x
  2. Step 2: Convert to fraction form
    87,062.94/120,044.30 = 80,606.79/x
  3. Step 3: Cross multiply
    87,062.94x = 120,044.30 × 80,606.79
  4. Step 4: Simplify right side
    87,062.94x = 9,676,385,882.31
  5. Step 5: Solve for x
    x = 9,676,385,882.31/87,062.94
  6. Step 6: Final answer
    x = 111,142.42

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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.