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Finding the Fourth Proportional to 92.97, 128.88 and 88.56

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Solution

The fourth proportional to 92.97, 128.88 and 88.56 is: 122.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.97 : 128.88 = 88.56 : x
  2. Step 2: Convert to fraction form
    92.97/128.88 = 88.56/x
  3. Step 3: Cross multiply
    92.97x = 128.88 × 88.56
  4. Step 4: Simplify right side
    92.97x = 11,413.61
  5. Step 5: Solve for x
    x = 11,413.61/92.97
  6. Step 6: Final answer
    x = 122.77

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.