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Finding the Fourth Proportional to 425,761.50, 638,456.81 and 122,088.55

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Solution

The fourth proportional to 425,761.50, 638,456.81 and 122,088.55 is: 183,079.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,761.50 : 638,456.81 = 122,088.55 : x
  2. Step 2: Convert to fraction form
    425,761.50/638,456.81 = 122,088.55/x
  3. Step 3: Cross multiply
    425,761.50x = 638,456.81 × 122,088.55
  4. Step 4: Simplify right side
    425,761.50x = 77,948,266,170.53
  5. Step 5: Solve for x
    x = 77,948,266,170.53/425,761.50
  6. Step 6: Final answer
    x = 183,079.65

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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.