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Finding the Fourth Proportional to 75.65, 104.42 and 49.46

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Solution

The fourth proportional to 75.65, 104.42 and 49.46 is: 68.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.65 : 104.42 = 49.46 : x
  2. Step 2: Convert to fraction form
    75.65/104.42 = 49.46/x
  3. Step 3: Cross multiply
    75.65x = 104.42 × 49.46
  4. Step 4: Simplify right side
    75.65x = 5,164.61
  5. Step 5: Solve for x
    x = 5,164.61/75.65
  6. Step 6: Final answer
    x = 68.27

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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.