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Finding the Fourth Proportional to 143.28, 215.04 and 100.56

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Solution

The fourth proportional to 143.28, 215.04 and 100.56 is: 150.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.28 : 215.04 = 100.56 : x
  2. Step 2: Convert to fraction form
    143.28/215.04 = 100.56/x
  3. Step 3: Cross multiply
    143.28x = 215.04 × 100.56
  4. Step 4: Simplify right side
    143.28x = 21,624.42
  5. Step 5: Solve for x
    x = 21,624.42/143.28
  6. Step 6: Final answer
    x = 150.92

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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.