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Finding the Fourth Proportional to 48.39, 66.78 and 26.56

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Solution

The fourth proportional to 48.39, 66.78 and 26.56 is: 36.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.39 : 66.78 = 26.56 : x
  2. Step 2: Convert to fraction form
    48.39/66.78 = 26.56/x
  3. Step 3: Cross multiply
    48.39x = 66.78 × 26.56
  4. Step 4: Simplify right side
    48.39x = 1,773.21
  5. Step 5: Solve for x
    x = 1,773.21/48.39
  6. Step 6: Final answer
    x = 36.65

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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.