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Finding the Fourth Proportional to 88.77, 133.78 and 80.22

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Solution

The fourth proportional to 88.77, 133.78 and 80.22 is: 120.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.77 : 133.78 = 80.22 : x
  2. Step 2: Convert to fraction form
    88.77/133.78 = 80.22/x
  3. Step 3: Cross multiply
    88.77x = 133.78 × 80.22
  4. Step 4: Simplify right side
    88.77x = 10,731.83
  5. Step 5: Solve for x
    x = 10,731.83/88.77
  6. Step 6: Final answer
    x = 120.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.