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Finding the Fourth Proportional to 113.94, 170.11 and 97.70

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Solution

The fourth proportional to 113.94, 170.11 and 97.70 is: 145.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.94 : 170.11 = 97.70 : x
  2. Step 2: Convert to fraction form
    113.94/170.11 = 97.70/x
  3. Step 3: Cross multiply
    113.94x = 170.11 × 97.70
  4. Step 4: Simplify right side
    113.94x = 16,619.02
  5. Step 5: Solve for x
    x = 16,619.02/113.94
  6. Step 6: Final answer
    x = 145.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.