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Finding the Fourth Proportional to 88.74, 132.37 and 74.39

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Solution

The fourth proportional to 88.74, 132.37 and 74.39 is: 110.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.74 : 132.37 = 74.39 : x
  2. Step 2: Convert to fraction form
    88.74/132.37 = 74.39/x
  3. Step 3: Cross multiply
    88.74x = 132.37 × 74.39
  4. Step 4: Simplify right side
    88.74x = 9,846.34
  5. Step 5: Solve for x
    x = 9,846.34/88.74
  6. Step 6: Final answer
    x = 110.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.