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Finding the Fourth Proportional to 143.60, 215.28 and 113.29

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Solution

The fourth proportional to 143.60, 215.28 and 113.29 is: 169.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.60 : 215.28 = 113.29 : x
  2. Step 2: Convert to fraction form
    143.60/215.28 = 113.29/x
  3. Step 3: Cross multiply
    143.60x = 215.28 × 113.29
  4. Step 4: Simplify right side
    143.60x = 24,388.53
  5. Step 5: Solve for x
    x = 24,388.53/143.60
  6. Step 6: Final answer
    x = 169.84

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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.