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Finding the Fourth Proportional to 243.49, 364.92 and 99.13

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Solution

The fourth proportional to 243.49, 364.92 and 99.13 is: 148.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.49 : 364.92 = 99.13 : x
  2. Step 2: Convert to fraction form
    243.49/364.92 = 99.13/x
  3. Step 3: Cross multiply
    243.49x = 364.92 × 99.13
  4. Step 4: Simplify right side
    243.49x = 36,174.02
  5. Step 5: Solve for x
    x = 36,174.02/243.49
  6. Step 6: Final answer
    x = 148.56

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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.