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Finding the Fourth Proportional to 176.59, 243.66 and 121.31

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Solution

The fourth proportional to 176.59, 243.66 and 121.31 is: 167.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.59 : 243.66 = 121.31 : x
  2. Step 2: Convert to fraction form
    176.59/243.66 = 121.31/x
  3. Step 3: Cross multiply
    176.59x = 243.66 × 121.31
  4. Step 4: Simplify right side
    176.59x = 29,557.18
  5. Step 5: Solve for x
    x = 29,557.18/176.59
  6. Step 6: Final answer
    x = 167.38

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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.