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Finding the Fourth Proportional to 143.04, 215.28 and 133.68

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Solution

The fourth proportional to 143.04, 215.28 and 133.68 is: 201.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.04 : 215.28 = 133.68 : x
  2. Step 2: Convert to fraction form
    143.04/215.28 = 133.68/x
  3. Step 3: Cross multiply
    143.04x = 215.28 × 133.68
  4. Step 4: Simplify right side
    143.04x = 28,778.63
  5. Step 5: Solve for x
    x = 28,778.63/143.04
  6. Step 6: Final answer
    x = 201.19

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.