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Finding the Fourth Proportional to 89.14, 133.46 and 79.16

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Solution

The fourth proportional to 89.14, 133.46 and 79.16 is: 118.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.14 : 133.46 = 79.16 : x
  2. Step 2: Convert to fraction form
    89.14/133.46 = 79.16/x
  3. Step 3: Cross multiply
    89.14x = 133.46 × 79.16
  4. Step 4: Simplify right side
    89.14x = 10,564.69
  5. Step 5: Solve for x
    x = 10,564.69/89.14
  6. Step 6: Final answer
    x = 118.52

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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.