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Finding the Fourth Proportional to 48.47, 67.18 and 47.89

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Solution

The fourth proportional to 48.47, 67.18 and 47.89 is: 66.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.47 : 67.18 = 47.89 : x
  2. Step 2: Convert to fraction form
    48.47/67.18 = 47.89/x
  3. Step 3: Cross multiply
    48.47x = 67.18 × 47.89
  4. Step 4: Simplify right side
    48.47x = 3,217.01
  5. Step 5: Solve for x
    x = 3,217.01/48.47
  6. Step 6: Final answer
    x = 66.37

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.