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Finding the Fourth Proportional to 48.70, 66.76 and 47.49

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Solution

The fourth proportional to 48.70, 66.76 and 47.49 is: 65.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.70 : 66.76 = 47.49 : x
  2. Step 2: Convert to fraction form
    48.70/66.76 = 47.49/x
  3. Step 3: Cross multiply
    48.70x = 66.76 × 47.49
  4. Step 4: Simplify right side
    48.70x = 3,170.43
  5. Step 5: Solve for x
    x = 3,170.43/48.70
  6. Step 6: Final answer
    x = 65.10

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.