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Finding the Fourth Proportional to 88.51, 132.42 and 75.67

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Solution

The fourth proportional to 88.51, 132.42 and 75.67 is: 113.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.51 : 132.42 = 75.67 : x
  2. Step 2: Convert to fraction form
    88.51/132.42 = 75.67/x
  3. Step 3: Cross multiply
    88.51x = 132.42 × 75.67
  4. Step 4: Simplify right side
    88.51x = 10,020.22
  5. Step 5: Solve for x
    x = 10,020.22/88.51
  6. Step 6: Final answer
    x = 113.21

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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.