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Finding the Fourth Proportional to 148.34, 204.52 and 121.66

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Solution

The fourth proportional to 148.34, 204.52 and 121.66 is: 167.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.34 : 204.52 = 121.66 : x
  2. Step 2: Convert to fraction form
    148.34/204.52 = 121.66/x
  3. Step 3: Cross multiply
    148.34x = 204.52 × 121.66
  4. Step 4: Simplify right side
    148.34x = 24,881.17
  5. Step 5: Solve for x
    x = 24,881.17/148.34
  6. Step 6: Final answer
    x = 167.73

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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.