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Finding the Fourth Proportional to 170.65, 235.44 and 111.61

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Solution

The fourth proportional to 170.65, 235.44 and 111.61 is: 153.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.65 : 235.44 = 111.61 : x
  2. Step 2: Convert to fraction form
    170.65/235.44 = 111.61/x
  3. Step 3: Cross multiply
    170.65x = 235.44 × 111.61
  4. Step 4: Simplify right side
    170.65x = 26,277.46
  5. Step 5: Solve for x
    x = 26,277.46/170.65
  6. Step 6: Final answer
    x = 153.98

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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.