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Finding the Fourth Proportional to 48.70, 67.21 and 26.87

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Solution

The fourth proportional to 48.70, 67.21 and 26.87 is: 37.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.70 : 67.21 = 26.87 : x
  2. Step 2: Convert to fraction form
    48.70/67.21 = 26.87/x
  3. Step 3: Cross multiply
    48.70x = 67.21 × 26.87
  4. Step 4: Simplify right side
    48.70x = 1,805.87
  5. Step 5: Solve for x
    x = 1,805.87/48.70
  6. Step 6: Final answer
    x = 37.08

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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.