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Finding the Fourth Proportional to 125,205.80, 172,843.83 and 71,480.43

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Solution

The fourth proportional to 125,205.80, 172,843.83 and 71,480.43 is: 98,677.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,205.80 : 172,843.83 = 71,480.43 : x
  2. Step 2: Convert to fraction form
    125,205.80/172,843.83 = 71,480.43/x
  3. Step 3: Cross multiply
    125,205.80x = 172,843.83 × 71,480.43
  4. Step 4: Simplify right side
    125,205.80x = 12,354,951,291.25
  5. Step 5: Solve for x
    x = 12,354,951,291.25/125,205.80
  6. Step 6: Final answer
    x = 98,677.15

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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.