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Finding the Fourth Proportional to 70.34, 97.07 and 66.29

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Solution

The fourth proportional to 70.34, 97.07 and 66.29 is: 91.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.34 : 97.07 = 66.29 : x
  2. Step 2: Convert to fraction form
    70.34/97.07 = 66.29/x
  3. Step 3: Cross multiply
    70.34x = 97.07 × 66.29
  4. Step 4: Simplify right side
    70.34x = 6,433.95
  5. Step 5: Solve for x
    x = 6,433.95/70.34
  6. Step 6: Final answer
    x = 91.48

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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.