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Finding the Fourth Proportional to 425,840.66, 638,575.55 and 122,167.81

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Solution

The fourth proportional to 425,840.66, 638,575.55 and 122,167.81 is: 183,198.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,840.66 : 638,575.55 = 122,167.81 : x
  2. Step 2: Convert to fraction form
    425,840.66/638,575.55 = 122,167.81/x
  3. Step 3: Cross multiply
    425,840.66x = 638,575.55 × 122,167.81
  4. Step 4: Simplify right side
    425,840.66x = 78,013,377,108.56
  5. Step 5: Solve for x
    x = 78,013,377,108.56/425,840.66
  6. Step 6: Final answer
    x = 183,198.52

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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.