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Finding the Fourth Proportional to 89.42, 133.76 and 62.28

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Solution

The fourth proportional to 89.42, 133.76 and 62.28 is: 93.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.42 : 133.76 = 62.28 : x
  2. Step 2: Convert to fraction form
    89.42/133.76 = 62.28/x
  3. Step 3: Cross multiply
    89.42x = 133.76 × 62.28
  4. Step 4: Simplify right side
    89.42x = 8,330.57
  5. Step 5: Solve for x
    x = 8,330.57/89.42
  6. Step 6: Final answer
    x = 93.16

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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.