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Finding the Fourth Proportional to 84,003.44, 125,961.42 and 39,618.28

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Solution

The fourth proportional to 84,003.44, 125,961.42 and 39,618.28 is: 59,406.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,003.44 : 125,961.42 = 39,618.28 : x
  2. Step 2: Convert to fraction form
    84,003.44/125,961.42 = 39,618.28/x
  3. Step 3: Cross multiply
    84,003.44x = 125,961.42 × 39,618.28
  4. Step 4: Simplify right side
    84,003.44x = 4,990,374,293.76
  5. Step 5: Solve for x
    x = 4,990,374,293.76/84,003.44
  6. Step 6: Final answer
    x = 59,406.78

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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.