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Finding the Fourth Proportional to 176.50, 243.62 and 121.21

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Solution

The fourth proportional to 176.50, 243.62 and 121.21 is: 167.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.50 : 243.62 = 121.21 : x
  2. Step 2: Convert to fraction form
    176.50/243.62 = 121.21/x
  3. Step 3: Cross multiply
    176.50x = 243.62 × 121.21
  4. Step 4: Simplify right side
    176.50x = 29,529.18
  5. Step 5: Solve for x
    x = 29,529.18/176.50
  6. Step 6: Final answer
    x = 167.30

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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.