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Finding the Fourth Proportional to 142.36, 212.17 and 114.82

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Solution

The fourth proportional to 142.36, 212.17 and 114.82 is: 171.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.36 : 212.17 = 114.82 : x
  2. Step 2: Convert to fraction form
    142.36/212.17 = 114.82/x
  3. Step 3: Cross multiply
    142.36x = 212.17 × 114.82
  4. Step 4: Simplify right side
    142.36x = 24,360.76
  5. Step 5: Solve for x
    x = 24,360.76/142.36
  6. Step 6: Final answer
    x = 171.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.