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Finding the Fourth Proportional to 70,204.97, 96,871.55 and 39,990.88

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Solution

The fourth proportional to 70,204.97, 96,871.55 and 39,990.88 is: 55,180.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,204.97 : 96,871.55 = 39,990.88 : x
  2. Step 2: Convert to fraction form
    70,204.97/96,871.55 = 39,990.88/x
  3. Step 3: Cross multiply
    70,204.97x = 96,871.55 × 39,990.88
  4. Step 4: Simplify right side
    70,204.97x = 3,873,978,452.60
  5. Step 5: Solve for x
    x = 3,873,978,452.60/70,204.97
  6. Step 6: Final answer
    x = 55,180.97

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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.