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Finding the Fourth Proportional to 425,596.32, 638,487.78 and 126,100.44

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Solution

The fourth proportional to 425,596.32, 638,487.78 and 126,100.44 is: 189,178.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,596.32 : 638,487.78 = 126,100.44 : x
  2. Step 2: Convert to fraction form
    425,596.32/638,487.78 = 126,100.44/x
  3. Step 3: Cross multiply
    425,596.32x = 638,487.78 × 126,100.44
  4. Step 4: Simplify right side
    425,596.32x = 80,513,589,992.62
  5. Step 5: Solve for x
    x = 80,513,589,992.62/425,596.32
  6. Step 6: Final answer
    x = 189,178.30

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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.