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Finding the Fourth Proportional to 74.61, 103.06 and 60.97

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Solution

The fourth proportional to 74.61, 103.06 and 60.97 is: 84.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.61 : 103.06 = 60.97 : x
  2. Step 2: Convert to fraction form
    74.61/103.06 = 60.97/x
  3. Step 3: Cross multiply
    74.61x = 103.06 × 60.97
  4. Step 4: Simplify right side
    74.61x = 6,283.06
  5. Step 5: Solve for x
    x = 6,283.06/74.61
  6. Step 6: Final answer
    x = 84.21

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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.