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Finding the Fourth Proportional to 88.71, 133.17 and 40.65

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Solution

The fourth proportional to 88.71, 133.17 and 40.65 is: 61.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.71 : 133.17 = 40.65 : x
  2. Step 2: Convert to fraction form
    88.71/133.17 = 40.65/x
  3. Step 3: Cross multiply
    88.71x = 133.17 × 40.65
  4. Step 4: Simplify right side
    88.71x = 5,413.36
  5. Step 5: Solve for x
    x = 5,413.36/88.71
  6. Step 6: Final answer
    x = 61.02

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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.