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Finding the Fourth Proportional to 74.06, 101.96 and 61.76

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Solution

The fourth proportional to 74.06, 101.96 and 61.76 is: 85.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.06 : 101.96 = 61.76 : x
  2. Step 2: Convert to fraction form
    74.06/101.96 = 61.76/x
  3. Step 3: Cross multiply
    74.06x = 101.96 × 61.76
  4. Step 4: Simplify right side
    74.06x = 6,296.23
  5. Step 5: Solve for x
    x = 6,296.23/74.06
  6. Step 6: Final answer
    x = 85.02

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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.