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Finding the Fourth Proportional to 140,932.20, 211,103.90 and 66,116.20

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Solution

The fourth proportional to 140,932.20, 211,103.90 and 66,116.20 is: 99,036.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,932.20 : 211,103.90 = 66,116.20 : x
  2. Step 2: Convert to fraction form
    140,932.20/211,103.90 = 66,116.20/x
  3. Step 3: Cross multiply
    140,932.20x = 211,103.90 × 66,116.20
  4. Step 4: Simplify right side
    140,932.20x = 13,957,387,673.18
  5. Step 5: Solve for x
    x = 13,957,387,673.18/140,932.20
  6. Step 6: Final answer
    x = 99,036.19

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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.