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Finding the Fourth Proportional to 92,045.52, 126,929.28 and 86,687.88

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Solution

The fourth proportional to 92,045.52, 126,929.28 and 86,687.88 is: 119,541.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,045.52 : 126,929.28 = 86,687.88 : x
  2. Step 2: Convert to fraction form
    92,045.52/126,929.28 = 86,687.88/x
  3. Step 3: Cross multiply
    92,045.52x = 126,929.28 × 86,687.88
  4. Step 4: Simplify right side
    92,045.52x = 11,003,230,193.13
  5. Step 5: Solve for x
    x = 11,003,230,193.13/92,045.52
  6. Step 6: Final answer
    x = 119,541.18

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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.