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Finding the Fourth Proportional to 125,149.80, 172,707.30 and 68,561

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Solution

The fourth proportional to 125,149.80, 172,707.30 and 68,561 is: 94,614.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,149.80 : 172,707.30 = 68,561 : x
  2. Step 2: Convert to fraction form
    125,149.80/172,707.30 = 68,561/x
  3. Step 3: Cross multiply
    125,149.80x = 172,707.30 × 68,561
  4. Step 4: Simplify right side
    125,149.80x = 11,840,985,195.30
  5. Step 5: Solve for x
    x = 11,840,985,195.30/125,149.80
  6. Step 6: Final answer
    x = 94,614.50

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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.