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Finding the Fourth Proportional to 143.15, 214.70 and 112.46

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Solution

The fourth proportional to 143.15, 214.70 and 112.46 is: 168.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.15 : 214.70 = 112.46 : x
  2. Step 2: Convert to fraction form
    143.15/214.70 = 112.46/x
  3. Step 3: Cross multiply
    143.15x = 214.70 × 112.46
  4. Step 4: Simplify right side
    143.15x = 24,143.53
  5. Step 5: Solve for x
    x = 24,143.53/143.15
  6. Step 6: Final answer
    x = 168.66

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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.