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Finding the Fourth Proportional to 73.76, 101.68 and 61.25

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Solution

The fourth proportional to 73.76, 101.68 and 61.25 is: 84.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.76 : 101.68 = 61.25 : x
  2. Step 2: Convert to fraction form
    73.76/101.68 = 61.25/x
  3. Step 3: Cross multiply
    73.76x = 101.68 × 61.25
  4. Step 4: Simplify right side
    73.76x = 6,227.24
  5. Step 5: Solve for x
    x = 6,227.24/73.76
  6. Step 6: Final answer
    x = 84.43

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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.