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Finding the Fourth Proportional to 73.71, 101.78 and 51.92

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Solution

The fourth proportional to 73.71, 101.78 and 51.92 is: 71.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.71 : 101.78 = 51.92 : x
  2. Step 2: Convert to fraction form
    73.71/101.78 = 51.92/x
  3. Step 3: Cross multiply
    73.71x = 101.78 × 51.92
  4. Step 4: Simplify right side
    73.71x = 5,283.65
  5. Step 5: Solve for x
    x = 5,283.65/73.71
  6. Step 6: Final answer
    x = 71.68

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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.