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Finding the Fourth Proportional to 98,139.88, 135,473.66 and 66,351.88

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Solution

The fourth proportional to 98,139.88, 135,473.66 and 66,351.88 is: 91,593.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,139.88 : 135,473.66 = 66,351.88 : x
  2. Step 2: Convert to fraction form
    98,139.88/135,473.66 = 66,351.88/x
  3. Step 3: Cross multiply
    98,139.88x = 135,473.66 × 66,351.88
  4. Step 4: Simplify right side
    98,139.88x = 8,988,932,031.48
  5. Step 5: Solve for x
    x = 8,988,932,031.48/98,139.88
  6. Step 6: Final answer
    x = 91,593.06

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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.