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Finding the Fourth Proportional to 90.33, 124.52 and 65.73

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Solution

The fourth proportional to 90.33, 124.52 and 65.73 is: 90.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.33 : 124.52 = 65.73 : x
  2. Step 2: Convert to fraction form
    90.33/124.52 = 65.73/x
  3. Step 3: Cross multiply
    90.33x = 124.52 × 65.73
  4. Step 4: Simplify right side
    90.33x = 8,184.37
  5. Step 5: Solve for x
    x = 8,184.37/90.33
  6. Step 6: Final answer
    x = 90.61

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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.