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Finding the Fourth Proportional to 425,575.88, 638,457.18 and 126,079.87

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Solution

The fourth proportional to 425,575.88, 638,457.18 and 126,079.87 is: 189,147.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,575.88 : 638,457.18 = 126,079.87 : x
  2. Step 2: Convert to fraction form
    425,575.88/638,457.18 = 126,079.87/x
  3. Step 3: Cross multiply
    425,575.88x = 638,457.18 × 126,079.87
  4. Step 4: Simplify right side
    425,575.88x = 80,496,595,062.68
  5. Step 5: Solve for x
    x = 80,496,595,062.68/425,575.88
  6. Step 6: Final answer
    x = 189,147.46

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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.