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Finding the Fourth Proportional to 144,042.80, 215,880.60 and 80,862.80

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Solution

The fourth proportional to 144,042.80, 215,880.60 and 80,862.80 is: 121,191.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,042.80 : 215,880.60 = 80,862.80 : x
  2. Step 2: Convert to fraction form
    144,042.80/215,880.60 = 80,862.80/x
  3. Step 3: Cross multiply
    144,042.80x = 215,880.60 × 80,862.80
  4. Step 4: Simplify right side
    144,042.80x = 17,456,709,781.68
  5. Step 5: Solve for x
    x = 17,456,709,781.68/144,042.80
  6. Step 6: Final answer
    x = 121,191.13

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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.