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Finding the Fourth Proportional to 88.24, 120.87 and 87.25

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Solution

The fourth proportional to 88.24, 120.87 and 87.25 is: 119.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.24 : 120.87 = 87.25 : x
  2. Step 2: Convert to fraction form
    88.24/120.87 = 87.25/x
  3. Step 3: Cross multiply
    88.24x = 120.87 × 87.25
  4. Step 4: Simplify right side
    88.24x = 10,545.93
  5. Step 5: Solve for x
    x = 10,545.93/88.24
  6. Step 6: Final answer
    x = 119.52

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.