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Finding the Fourth Proportional to 113,671.92, 156,863.64 and 62,686.80

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Solution

The fourth proportional to 113,671.92, 156,863.64 and 62,686.80 is: 86,505.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,671.92 : 156,863.64 = 62,686.80 : x
  2. Step 2: Convert to fraction form
    113,671.92/156,863.64 = 62,686.80/x
  3. Step 3: Cross multiply
    113,671.92x = 156,863.64 × 62,686.80
  4. Step 4: Simplify right side
    113,671.92x = 9,833,279,627.95
  5. Step 5: Solve for x
    x = 9,833,279,627.95/113,671.92
  6. Step 6: Final answer
    x = 86,505.79

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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.