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Finding the Fourth Proportional to 176.62, 243.76 and 99

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Solution

The fourth proportional to 176.62, 243.76 and 99 is: 136.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.62 : 243.76 = 99 : x
  2. Step 2: Convert to fraction form
    176.62/243.76 = 99/x
  3. Step 3: Cross multiply
    176.62x = 243.76 × 99
  4. Step 4: Simplify right side
    176.62x = 24,132.24
  5. Step 5: Solve for x
    x = 24,132.24/176.62
  6. Step 6: Final answer
    x = 136.63

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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.