Home / 425,815.14-638,613.72-126,225.68

Finding the Fourth Proportional to 425,815.14, 638,613.72 and 126,225.68

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Solution

The fourth proportional to 425,815.14, 638,613.72 and 126,225.68 is: 189,306.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,815.14 : 638,613.72 = 126,225.68 : x
  2. Step 2: Convert to fraction form
    425,815.14/638,613.72 = 126,225.68/x
  3. Step 3: Cross multiply
    425,815.14x = 638,613.72 × 126,225.68
  4. Step 4: Simplify right side
    425,815.14x = 80,609,451,064.33
  5. Step 5: Solve for x
    x = 80,609,451,064.33/425,815.14
  6. Step 6: Final answer
    x = 189,306.21

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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.