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Finding the Fourth Proportional to 125,109.76, 172,654.32 and 68,520.64

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Solution

The fourth proportional to 125,109.76, 172,654.32 and 68,520.64 is: 94,560.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,109.76 : 172,654.32 = 68,520.64 : x
  2. Step 2: Convert to fraction form
    125,109.76/172,654.32 = 68,520.64/x
  3. Step 3: Cross multiply
    125,109.76x = 172,654.32 × 68,520.64
  4. Step 4: Simplify right side
    125,109.76x = 11,830,384,505.16
  5. Step 5: Solve for x
    x = 11,830,384,505.16/125,109.76
  6. Step 6: Final answer
    x = 94,560.04

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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.