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Finding the Fourth Proportional to 125,042.88, 172,524.96 and 80,356.80

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Solution

The fourth proportional to 125,042.88, 172,524.96 and 80,356.80 is: 110,870.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,042.88 : 172,524.96 = 80,356.80 : x
  2. Step 2: Convert to fraction form
    125,042.88/172,524.96 = 80,356.80/x
  3. Step 3: Cross multiply
    125,042.88x = 172,524.96 × 80,356.80
  4. Step 4: Simplify right side
    125,042.88x = 13,863,553,705.73
  5. Step 5: Solve for x
    x = 13,863,553,705.73/125,042.88
  6. Step 6: Final answer
    x = 110,870.40

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1.5x scale

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.