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Finding the Fourth Proportional to 425,825.16, 638,628.72 and 126,235.68

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Solution

The fourth proportional to 425,825.16, 638,628.72 and 126,235.68 is: 189,321.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,825.16 : 638,628.72 = 126,235.68 : x
  2. Step 2: Convert to fraction form
    425,825.16/638,628.72 = 126,235.68/x
  3. Step 3: Cross multiply
    425,825.16x = 638,628.72 × 126,235.68
  4. Step 4: Simplify right side
    425,825.16x = 80,617,730,736.73
  5. Step 5: Solve for x
    x = 80,617,730,736.73/425,825.16
  6. Step 6: Final answer
    x = 189,321.20

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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.