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Finding the Fourth Proportional to 70.34, 96.93 and 66.79

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Solution

The fourth proportional to 70.34, 96.93 and 66.79 is: 92.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.34 : 96.93 = 66.79 : x
  2. Step 2: Convert to fraction form
    70.34/96.93 = 66.79/x
  3. Step 3: Cross multiply
    70.34x = 96.93 × 66.79
  4. Step 4: Simplify right side
    70.34x = 6,474.08
  5. Step 5: Solve for x
    x = 6,474.08/70.34
  6. Step 6: Final answer
    x = 92.05

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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.