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Finding the Fourth Proportional to 425,626.02, 638,445.33 and 126,136.98

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Solution

The fourth proportional to 425,626.02, 638,445.33 and 126,136.98 is: 189,207.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,626.02 : 638,445.33 = 126,136.98 : x
  2. Step 2: Convert to fraction form
    425,626.02/638,445.33 = 126,136.98/x
  3. Step 3: Cross multiply
    425,626.02x = 638,445.33 × 126,136.98
  4. Step 4: Simplify right side
    425,626.02x = 80,531,565,821.30
  5. Step 5: Solve for x
    x = 80,531,565,821.30/425,626.02
  6. Step 6: Final answer
    x = 189,207.34

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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.