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Finding the Fourth Proportional to 425,382.66, 638,072.13 and 125,865.12

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Solution

The fourth proportional to 425,382.66, 638,072.13 and 125,865.12 is: 188,797.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,382.66 : 638,072.13 = 125,865.12 : x
  2. Step 2: Convert to fraction form
    425,382.66/638,072.13 = 125,865.12/x
  3. Step 3: Cross multiply
    425,382.66x = 638,072.13 × 125,865.12
  4. Step 4: Simplify right side
    425,382.66x = 80,311,025,211.11
  5. Step 5: Solve for x
    x = 80,311,025,211.11/425,382.66
  6. Step 6: Final answer
    x = 188,797.13

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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.