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Finding the Fourth Proportional to 143.70, 215.35 and 88.68

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Solution

The fourth proportional to 143.70, 215.35 and 88.68 is: 132.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.70 : 215.35 = 88.68 : x
  2. Step 2: Convert to fraction form
    143.70/215.35 = 88.68/x
  3. Step 3: Cross multiply
    143.70x = 215.35 × 88.68
  4. Step 4: Simplify right side
    143.70x = 19,097.24
  5. Step 5: Solve for x
    x = 19,097.24/143.70
  6. Step 6: Final answer
    x = 132.90

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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.