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Finding the Fourth Proportional to 143,886.53, 215,891.96 and 77,248.85

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Solution

The fourth proportional to 143,886.53, 215,891.96 and 77,248.85 is: 115,906.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,886.53 : 215,891.96 = 77,248.85 : x
  2. Step 2: Convert to fraction form
    143,886.53/215,891.96 = 77,248.85/x
  3. Step 3: Cross multiply
    143,886.53x = 215,891.96 × 77,248.85
  4. Step 4: Simplify right side
    143,886.53x = 16,677,404,168.54
  5. Step 5: Solve for x
    x = 16,677,404,168.54/143,886.53
  6. Step 6: Final answer
    x = 115,906.64

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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.