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Finding the Fourth Proportional to 88.18, 132.20 and 47.58

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Solution

The fourth proportional to 88.18, 132.20 and 47.58 is: 71.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.18 : 132.20 = 47.58 : x
  2. Step 2: Convert to fraction form
    88.18/132.20 = 47.58/x
  3. Step 3: Cross multiply
    88.18x = 132.20 × 47.58
  4. Step 4: Simplify right side
    88.18x = 6,290.08
  5. Step 5: Solve for x
    x = 6,290.08/88.18
  6. Step 6: Final answer
    x = 71.33

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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.