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Finding the Fourth Proportional to 160.31, 221.31 and 116.72

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Solution

The fourth proportional to 160.31, 221.31 and 116.72 is: 161.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.31 : 221.31 = 116.72 : x
  2. Step 2: Convert to fraction form
    160.31/221.31 = 116.72/x
  3. Step 3: Cross multiply
    160.31x = 221.31 × 116.72
  4. Step 4: Simplify right side
    160.31x = 25,831.94
  5. Step 5: Solve for x
    x = 25,831.94/160.31
  6. Step 6: Final answer
    x = 161.13

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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.