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Finding the Fourth Proportional to 125,142.57, 172,694.43 and 68,553.54

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Solution

The fourth proportional to 125,142.57, 172,694.43 and 68,553.54 is: 94,602.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,142.57 : 172,694.43 = 68,553.54 : x
  2. Step 2: Convert to fraction form
    125,142.57/172,694.43 = 68,553.54/x
  3. Step 3: Cross multiply
    125,142.57x = 172,694.43 × 68,553.54
  4. Step 4: Simplify right side
    125,142.57x = 11,838,814,514.78
  5. Step 5: Solve for x
    x = 11,838,814,514.78/125,142.57
  6. Step 6: Final answer
    x = 94,602.62

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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.