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Finding the Fourth Proportional to 48.72, 66.92 and 45.68

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Solution

The fourth proportional to 48.72, 66.92 and 45.68 is: 62.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.72 : 66.92 = 45.68 : x
  2. Step 2: Convert to fraction form
    48.72/66.92 = 45.68/x
  3. Step 3: Cross multiply
    48.72x = 66.92 × 45.68
  4. Step 4: Simplify right side
    48.72x = 3,056.91
  5. Step 5: Solve for x
    x = 3,056.91/48.72
  6. Step 6: Final answer
    x = 62.74

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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.