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Finding the Fourth Proportional to 144,451.80, 216,500.22 and 81,138.82

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Solution

The fourth proportional to 144,451.80, 216,500.22 and 81,138.82 is: 121,608.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,451.80 : 216,500.22 = 81,138.82 : x
  2. Step 2: Convert to fraction form
    144,451.80/216,500.22 = 81,138.82/x
  3. Step 3: Cross multiply
    144,451.80x = 216,500.22 × 81,138.82
  4. Step 4: Simplify right side
    144,451.80x = 17,566,572,380.54
  5. Step 5: Solve for x
    x = 17,566,572,380.54/144,451.80
  6. Step 6: Final answer
    x = 121,608.54

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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.