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Finding the Fourth Proportional to 141.76, 213.55 and 111.46

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Solution

The fourth proportional to 141.76, 213.55 and 111.46 is: 167.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.76 : 213.55 = 111.46 : x
  2. Step 2: Convert to fraction form
    141.76/213.55 = 111.46/x
  3. Step 3: Cross multiply
    141.76x = 213.55 × 111.46
  4. Step 4: Simplify right side
    141.76x = 23,802.28
  5. Step 5: Solve for x
    x = 23,802.28/141.76
  6. Step 6: Final answer
    x = 167.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.