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Finding the Fourth Proportional to 70.76, 97.64 and 61.04

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Solution

The fourth proportional to 70.76, 97.64 and 61.04 is: 84.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.76 : 97.64 = 61.04 : x
  2. Step 2: Convert to fraction form
    70.76/97.64 = 61.04/x
  3. Step 3: Cross multiply
    70.76x = 97.64 × 61.04
  4. Step 4: Simplify right side
    70.76x = 5,959.95
  5. Step 5: Solve for x
    x = 5,959.95/70.76
  6. Step 6: Final answer
    x = 84.23

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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.