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Finding the Fourth Proportional to 125,659.30, 188,521.76 and 65,691.76

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Solution

The fourth proportional to 125,659.30, 188,521.76 and 65,691.76 is: 98,554.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,659.30 : 188,521.76 = 65,691.76 : x
  2. Step 2: Convert to fraction form
    125,659.30/188,521.76 = 65,691.76/x
  3. Step 3: Cross multiply
    125,659.30x = 188,521.76 × 65,691.76
  4. Step 4: Simplify right side
    125,659.30x = 12,384,326,212.70
  5. Step 5: Solve for x
    x = 12,384,326,212.70/125,659.30
  6. Step 6: Final answer
    x = 98,554.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.