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Finding the Fourth Proportional to 142.56, 213.72 and 114

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Solution

The fourth proportional to 142.56, 213.72 and 114 is: 170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.56 : 213.72 = 114 : x
  2. Step 2: Convert to fraction form
    142.56/213.72 = 114/x
  3. Step 3: Cross multiply
    142.56x = 213.72 × 114
  4. Step 4: Simplify right side
    142.56x = 24,364.08
  5. Step 5: Solve for x
    x = 24,364.08/142.56
  6. Step 6: Final answer
    x = 170.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.