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Finding the Fourth Proportional to 112,138.65, 168,017.57 and 67,671.97

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Solution

The fourth proportional to 112,138.65, 168,017.57 and 67,671.97 is: 101,393.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,138.65 : 168,017.57 = 67,671.97 : x
  2. Step 2: Convert to fraction form
    112,138.65/168,017.57 = 67,671.97/x
  3. Step 3: Cross multiply
    112,138.65x = 168,017.57 × 67,671.97
  4. Step 4: Simplify right side
    112,138.65x = 11,370,079,497.83
  5. Step 5: Solve for x
    x = 11,370,079,497.83/112,138.65
  6. Step 6: Final answer
    x = 101,393.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.