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Finding the Fourth Proportional to 113.94, 169.65 and 112.21

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Solution

The fourth proportional to 113.94, 169.65 and 112.21 is: 167.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.94 : 169.65 = 112.21 : x
  2. Step 2: Convert to fraction form
    113.94/169.65 = 112.21/x
  3. Step 3: Cross multiply
    113.94x = 169.65 × 112.21
  4. Step 4: Simplify right side
    113.94x = 19,036.00
  5. Step 5: Solve for x
    x = 19,036.00/113.94
  6. Step 6: Final answer
    x = 167.07

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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.