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Finding the Fourth Proportional to 74.68, 103.02 and 66.52

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Solution

The fourth proportional to 74.68, 103.02 and 66.52 is: 91.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.68 : 103.02 = 66.52 : x
  2. Step 2: Convert to fraction form
    74.68/103.02 = 66.52/x
  3. Step 3: Cross multiply
    74.68x = 103.02 × 66.52
  4. Step 4: Simplify right side
    74.68x = 6,852.89
  5. Step 5: Solve for x
    x = 6,852.89/74.68
  6. Step 6: Final answer
    x = 91.76

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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.