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Finding the Fourth Proportional to 112,691.16, 169,042.20 and 92,933.64

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Solution

The fourth proportional to 112,691.16, 169,042.20 and 92,933.64 is: 139,404.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,691.16 : 169,042.20 = 92,933.64 : x
  2. Step 2: Convert to fraction form
    112,691.16/169,042.20 = 92,933.64/x
  3. Step 3: Cross multiply
    112,691.16x = 169,042.20 × 92,933.64
  4. Step 4: Simplify right side
    112,691.16x = 15,709,706,959.61
  5. Step 5: Solve for x
    x = 15,709,706,959.61/112,691.16
  6. Step 6: Final answer
    x = 139,404.96

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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.