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Finding the Fourth Proportional to 49.08, 68.12 and 45.48

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Solution

The fourth proportional to 49.08, 68.12 and 45.48 is: 63.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.08 : 68.12 = 45.48 : x
  2. Step 2: Convert to fraction form
    49.08/68.12 = 45.48/x
  3. Step 3: Cross multiply
    49.08x = 68.12 × 45.48
  4. Step 4: Simplify right side
    49.08x = 3,097.87
  5. Step 5: Solve for x
    x = 3,097.87/49.08
  6. Step 6: Final answer
    x = 63.12

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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.