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Finding the Fourth Proportional to 108,956.16, 163,335.60 and 75,691.80

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Solution

The fourth proportional to 108,956.16, 163,335.60 and 75,691.80 is: 113,469.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,956.16 : 163,335.60 = 75,691.80 : x
  2. Step 2: Convert to fraction form
    108,956.16/163,335.60 = 75,691.80/x
  3. Step 3: Cross multiply
    108,956.16x = 163,335.60 × 75,691.80
  4. Step 4: Simplify right side
    108,956.16x = 12,363,165,568.08
  5. Step 5: Solve for x
    x = 12,363,165,568.08/108,956.16
  6. Step 6: Final answer
    x = 113,469.17

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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.