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Finding the Fourth Proportional to 98,496.72, 135,882.12 and 66,654.48

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Solution

The fourth proportional to 98,496.72, 135,882.12 and 66,654.48 is: 91,953.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,496.72 : 135,882.12 = 66,654.48 : x
  2. Step 2: Convert to fraction form
    98,496.72/135,882.12 = 66,654.48/x
  3. Step 3: Cross multiply
    98,496.72x = 135,882.12 × 66,654.48
  4. Step 4: Simplify right side
    98,496.72x = 9,057,152,049.90
  5. Step 5: Solve for x
    x = 9,057,152,049.90/98,496.72
  6. Step 6: Final answer
    x = 91,953.84

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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.