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Finding the Fourth Proportional to 108,961.80, 163,442.70 and 38,815.80

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Solution

The fourth proportional to 108,961.80, 163,442.70 and 38,815.80 is: 58,223.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,961.80 : 163,442.70 = 38,815.80 : x
  2. Step 2: Convert to fraction form
    108,961.80/163,442.70 = 38,815.80/x
  3. Step 3: Cross multiply
    108,961.80x = 163,442.70 × 38,815.80
  4. Step 4: Simplify right side
    108,961.80x = 6,344,159,154.66
  5. Step 5: Solve for x
    x = 6,344,159,154.66/108,961.80
  6. Step 6: Final answer
    x = 58,223.70

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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.