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Finding the Fourth Proportional to 90,493.78, 124,879.03 and 49,657.78

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Solution

The fourth proportional to 90,493.78, 124,879.03 and 49,657.78 is: 68,526.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,493.78 : 124,879.03 = 49,657.78 : x
  2. Step 2: Convert to fraction form
    90,493.78/124,879.03 = 49,657.78/x
  3. Step 3: Cross multiply
    90,493.78x = 124,879.03 × 49,657.78
  4. Step 4: Simplify right side
    90,493.78x = 6,201,215,398.35
  5. Step 5: Solve for x
    x = 6,201,215,398.35/90,493.78
  6. Step 6: Final answer
    x = 68,526.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.