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Finding the Fourth Proportional to 125,109.52, 172,654.32 and 68,520.80

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Solution

The fourth proportional to 125,109.52, 172,654.32 and 68,520.80 is: 94,560.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,109.52 : 172,654.32 = 68,520.80 : x
  2. Step 2: Convert to fraction form
    125,109.52/172,654.32 = 68,520.80/x
  3. Step 3: Cross multiply
    125,109.52x = 172,654.32 × 68,520.80
  4. Step 4: Simplify right side
    125,109.52x = 11,830,412,129.86
  5. Step 5: Solve for x
    x = 11,830,412,129.86/125,109.52
  6. Step 6: Final answer
    x = 94,560.45

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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.