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Finding the Fourth Proportional to 89.55, 134.46 and 79.47

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Solution

The fourth proportional to 89.55, 134.46 and 79.47 is: 119.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.55 : 134.46 = 79.47 : x
  2. Step 2: Convert to fraction form
    89.55/134.46 = 79.47/x
  3. Step 3: Cross multiply
    89.55x = 134.46 × 79.47
  4. Step 4: Simplify right side
    89.55x = 10,685.54
  5. Step 5: Solve for x
    x = 10,685.54/89.55
  6. Step 6: Final answer
    x = 119.32

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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.