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Finding the Fourth Proportional to 454,080.80, 681,121.20 and 138,537.20

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Solution

The fourth proportional to 454,080.80, 681,121.20 and 138,537.20 is: 207,805.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,080.80 : 681,121.20 = 138,537.20 : x
  2. Step 2: Convert to fraction form
    454,080.80/681,121.20 = 138,537.20/x
  3. Step 3: Cross multiply
    454,080.80x = 681,121.20 × 138,537.20
  4. Step 4: Simplify right side
    454,080.80x = 94,360,623,908.64
  5. Step 5: Solve for x
    x = 94,360,623,908.64/454,080.80
  6. Step 6: Final answer
    x = 207,805.80

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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.