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Finding the Fourth Proportional to 88.26, 132.40 and 74.90

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Solution

The fourth proportional to 88.26, 132.40 and 74.90 is: 112.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.26 : 132.40 = 74.90 : x
  2. Step 2: Convert to fraction form
    88.26/132.40 = 74.90/x
  3. Step 3: Cross multiply
    88.26x = 132.40 × 74.90
  4. Step 4: Simplify right side
    88.26x = 9,916.76
  5. Step 5: Solve for x
    x = 9,916.76/88.26
  6. Step 6: Final answer
    x = 112.36

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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.