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Finding the Fourth Proportional to 454,081.88, 681,120.90 and 138,537.72

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Solution

The fourth proportional to 454,081.88, 681,120.90 and 138,537.72 is: 207,805.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,081.88 : 681,120.90 = 138,537.72 : x
  2. Step 2: Convert to fraction form
    454,081.88/681,120.90 = 138,537.72/x
  3. Step 3: Cross multiply
    454,081.88x = 681,120.90 × 138,537.72
  4. Step 4: Simplify right side
    454,081.88x = 94,360,936,530.35
  5. Step 5: Solve for x
    x = 94,360,936,530.35/454,081.88
  6. Step 6: Final answer
    x = 207,805.99

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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.