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Finding the Fourth Proportional to 144,355, 199,209.92 and 80,691.44

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Solution

The fourth proportional to 144,355, 199,209.92 and 80,691.44 is: 111,354.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,355 : 199,209.92 = 80,691.44 : x
  2. Step 2: Convert to fraction form
    144,355/199,209.92 = 80,691.44/x
  3. Step 3: Cross multiply
    144,355x = 199,209.92 × 80,691.44
  4. Step 4: Simplify right side
    144,355x = 16,074,535,307.08
  5. Step 5: Solve for x
    x = 16,074,535,307.08/144,355
  6. Step 6: Final answer
    x = 111,354.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.