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Finding the Fourth Proportional to 141,691.20, 212,536.80 and 119,140.80

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Solution

The fourth proportional to 141,691.20, 212,536.80 and 119,140.80 is: 178,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,691.20 : 212,536.80 = 119,140.80 : x
  2. Step 2: Convert to fraction form
    141,691.20/212,536.80 = 119,140.80/x
  3. Step 3: Cross multiply
    141,691.20x = 212,536.80 × 119,140.80
  4. Step 4: Simplify right side
    141,691.20x = 25,321,804,381.44
  5. Step 5: Solve for x
    x = 25,321,804,381.44/141,691.20
  6. Step 6: Final answer
    x = 178,711.20

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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.