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Finding the Fourth Proportional to 48.96, 67.49 and 42.34

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Solution

The fourth proportional to 48.96, 67.49 and 42.34 is: 58.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.96 : 67.49 = 42.34 : x
  2. Step 2: Convert to fraction form
    48.96/67.49 = 42.34/x
  3. Step 3: Cross multiply
    48.96x = 67.49 × 42.34
  4. Step 4: Simplify right side
    48.96x = 2,857.53
  5. Step 5: Solve for x
    x = 2,857.53/48.96
  6. Step 6: Final answer
    x = 58.36

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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.