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Finding the Fourth Proportional to 89.96, 135.08 and 62.88

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Solution

The fourth proportional to 89.96, 135.08 and 62.88 is: 94.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.96 : 135.08 = 62.88 : x
  2. Step 2: Convert to fraction form
    89.96/135.08 = 62.88/x
  3. Step 3: Cross multiply
    89.96x = 135.08 × 62.88
  4. Step 4: Simplify right side
    89.96x = 8,493.83
  5. Step 5: Solve for x
    x = 8,493.83/89.96
  6. Step 6: Final answer
    x = 94.42

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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.