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Finding the Fourth Proportional to 170.74, 235.58 and 111.72

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Solution

The fourth proportional to 170.74, 235.58 and 111.72 is: 154.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.74 : 235.58 = 111.72 : x
  2. Step 2: Convert to fraction form
    170.74/235.58 = 111.72/x
  3. Step 3: Cross multiply
    170.74x = 235.58 × 111.72
  4. Step 4: Simplify right side
    170.74x = 26,319.00
  5. Step 5: Solve for x
    x = 26,319.00/170.74
  6. Step 6: Final answer
    x = 154.15

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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.