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Finding the Fourth Proportional to 97.91, 134.98 and 70.23

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Solution

The fourth proportional to 97.91, 134.98 and 70.23 is: 96.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.91 : 134.98 = 70.23 : x
  2. Step 2: Convert to fraction form
    97.91/134.98 = 70.23/x
  3. Step 3: Cross multiply
    97.91x = 134.98 × 70.23
  4. Step 4: Simplify right side
    97.91x = 9,479.65
  5. Step 5: Solve for x
    x = 9,479.65/97.91
  6. Step 6: Final answer
    x = 96.82

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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.