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Finding the Fourth Proportional to 49.04, 67.76 and 42.56

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Solution

The fourth proportional to 49.04, 67.76 and 42.56 is: 58.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.04 : 67.76 = 42.56 : x
  2. Step 2: Convert to fraction form
    49.04/67.76 = 42.56/x
  3. Step 3: Cross multiply
    49.04x = 67.76 × 42.56
  4. Step 4: Simplify right side
    49.04x = 2,883.87
  5. Step 5: Solve for x
    x = 2,883.87/49.04
  6. Step 6: Final answer
    x = 58.81

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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.