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Finding the Fourth Proportional to 143.52, 214.04 and 129.68

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Solution

The fourth proportional to 143.52, 214.04 and 129.68 is: 193.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.52 : 214.04 = 129.68 : x
  2. Step 2: Convert to fraction form
    143.52/214.04 = 129.68/x
  3. Step 3: Cross multiply
    143.52x = 214.04 × 129.68
  4. Step 4: Simplify right side
    143.52x = 27,755.31
  5. Step 5: Solve for x
    x = 27,755.31/143.52
  6. Step 6: Final answer
    x = 193.40

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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.