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Finding the Fourth Proportional to 143,987.52, 215,952.12 and 38,781.90

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Solution

The fourth proportional to 143,987.52, 215,952.12 and 38,781.90 is: 58,165.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,987.52 : 215,952.12 = 38,781.90 : x
  2. Step 2: Convert to fraction form
    143,987.52/215,952.12 = 38,781.90/x
  3. Step 3: Cross multiply
    143,987.52x = 215,952.12 × 38,781.90
  4. Step 4: Simplify right side
    143,987.52x = 8,375,033,522.63
  5. Step 5: Solve for x
    x = 8,375,033,522.63/143,987.52
  6. Step 6: Final answer
    x = 58,165.00

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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.