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Finding the Fourth Proportional to 425,577.88, 638,460.20 and 126,081.88

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Solution

The fourth proportional to 425,577.88, 638,460.20 and 126,081.88 is: 189,150.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,577.88 : 638,460.20 = 126,081.88 : x
  2. Step 2: Convert to fraction form
    425,577.88/638,460.20 = 126,081.88/x
  3. Step 3: Cross multiply
    425,577.88x = 638,460.20 × 126,081.88
  4. Step 4: Simplify right side
    425,577.88x = 80,498,262,321.18
  5. Step 5: Solve for x
    x = 80,498,262,321.18/425,577.88
  6. Step 6: Final answer
    x = 189,150.48

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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.