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Finding the Fourth Proportional to 425,617.80, 638,366.49 and 126,130.02

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Solution

The fourth proportional to 425,617.80, 638,366.49 and 126,130.02 is: 189,177.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,617.80 : 638,366.49 = 126,130.02 : x
  2. Step 2: Convert to fraction form
    425,617.80/638,366.49 = 126,130.02/x
  3. Step 3: Cross multiply
    425,617.80x = 638,366.49 × 126,130.02
  4. Step 4: Simplify right side
    425,617.80x = 80,517,178,151.03
  5. Step 5: Solve for x
    x = 80,517,178,151.03/425,617.80
  6. Step 6: Final answer
    x = 189,177.19

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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.