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Finding the Fourth Proportional to 88.45, 131.94 and 80.58

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Solution

The fourth proportional to 88.45, 131.94 and 80.58 is: 120.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.45 : 131.94 = 80.58 : x
  2. Step 2: Convert to fraction form
    88.45/131.94 = 80.58/x
  3. Step 3: Cross multiply
    88.45x = 131.94 × 80.58
  4. Step 4: Simplify right side
    88.45x = 10,631.73
  5. Step 5: Solve for x
    x = 10,631.73/88.45
  6. Step 6: Final answer
    x = 120.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.