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Finding the Fourth Proportional to 48.30, 66.69 and 31.96

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Solution

The fourth proportional to 48.30, 66.69 and 31.96 is: 44.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.30 : 66.69 = 31.96 : x
  2. Step 2: Convert to fraction form
    48.30/66.69 = 31.96/x
  3. Step 3: Cross multiply
    48.30x = 66.69 × 31.96
  4. Step 4: Simplify right side
    48.30x = 2,131.08
  5. Step 5: Solve for x
    x = 2,131.08/48.30
  6. Step 6: Final answer
    x = 44.12

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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.