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Finding the Fourth Proportional to 89.17, 133.66 and 50.64

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Solution

The fourth proportional to 89.17, 133.66 and 50.64 is: 75.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.17 : 133.66 = 50.64 : x
  2. Step 2: Convert to fraction form
    89.17/133.66 = 50.64/x
  3. Step 3: Cross multiply
    89.17x = 133.66 × 50.64
  4. Step 4: Simplify right side
    89.17x = 6,768.10
  5. Step 5: Solve for x
    x = 6,768.10/89.17
  6. Step 6: Final answer
    x = 75.90

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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.