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Finding the Fourth Proportional to 89.98, 135 and 41.92

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Solution

The fourth proportional to 89.98, 135 and 41.92 is: 62.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.98 : 135 = 41.92 : x
  2. Step 2: Convert to fraction form
    89.98/135 = 41.92/x
  3. Step 3: Cross multiply
    89.98x = 135 × 41.92
  4. Step 4: Simplify right side
    89.98x = 5,659.20
  5. Step 5: Solve for x
    x = 5,659.20/89.98
  6. Step 6: Final answer
    x = 62.89

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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.