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Finding the Fourth Proportional to 108,876.53, 163,325.13 and 42,321.80

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Solution

The fourth proportional to 108,876.53, 163,325.13 and 42,321.80 is: 63,486.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,876.53 : 163,325.13 = 42,321.80 : x
  2. Step 2: Convert to fraction form
    108,876.53/163,325.13 = 42,321.80/x
  3. Step 3: Cross multiply
    108,876.53x = 163,325.13 × 42,321.80
  4. Step 4: Simplify right side
    108,876.53x = 6,912,213,736.44
  5. Step 5: Solve for x
    x = 6,912,213,736.44/108,876.53
  6. Step 6: Final answer
    x = 63,486.72

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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.