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Finding the Fourth Proportional to 89.92, 124.08 and 55.44

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Solution

The fourth proportional to 89.92, 124.08 and 55.44 is: 76.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.92 : 124.08 = 55.44 : x
  2. Step 2: Convert to fraction form
    89.92/124.08 = 55.44/x
  3. Step 3: Cross multiply
    89.92x = 124.08 × 55.44
  4. Step 4: Simplify right side
    89.92x = 6,879.00
  5. Step 5: Solve for x
    x = 6,879.00/89.92
  6. Step 6: Final answer
    x = 76.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.