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Finding the Fourth Proportional to 48.95, 73.72 and 40.91

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Solution

The fourth proportional to 48.95, 73.72 and 40.91 is: 61.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.95 : 73.72 = 40.91 : x
  2. Step 2: Convert to fraction form
    48.95/73.72 = 40.91/x
  3. Step 3: Cross multiply
    48.95x = 73.72 × 40.91
  4. Step 4: Simplify right side
    48.95x = 3,015.68
  5. Step 5: Solve for x
    x = 3,015.68/48.95
  6. Step 6: Final answer
    x = 61.61

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.