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Finding the Fourth Proportional to 170.54, 235.53 and 121.53

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Solution

The fourth proportional to 170.54, 235.53 and 121.53 is: 167.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.54 : 235.53 = 121.53 : x
  2. Step 2: Convert to fraction form
    170.54/235.53 = 121.53/x
  3. Step 3: Cross multiply
    170.54x = 235.53 × 121.53
  4. Step 4: Simplify right side
    170.54x = 28,623.96
  5. Step 5: Solve for x
    x = 28,623.96/170.54
  6. Step 6: Final answer
    x = 167.85

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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.