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Finding the Fourth Proportional to 48.39, 73.04 and 48.12

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Solution

The fourth proportional to 48.39, 73.04 and 48.12 is: 72.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.39 : 73.04 = 48.12 : x
  2. Step 2: Convert to fraction form
    48.39/73.04 = 48.12/x
  3. Step 3: Cross multiply
    48.39x = 73.04 × 48.12
  4. Step 4: Simplify right side
    48.39x = 3,514.68
  5. Step 5: Solve for x
    x = 3,514.68/48.39
  6. Step 6: Final answer
    x = 72.63

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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.