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Finding the Fourth Proportional to 112,439.80, 168,659.70 and 68,043.70

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Solution

The fourth proportional to 112,439.80, 168,659.70 and 68,043.70 is: 102,065.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,439.80 : 168,659.70 = 68,043.70 : x
  2. Step 2: Convert to fraction form
    112,439.80/168,659.70 = 68,043.70/x
  3. Step 3: Cross multiply
    112,439.80x = 168,659.70 × 68,043.70
  4. Step 4: Simplify right side
    112,439.80x = 11,476,230,028.89
  5. Step 5: Solve for x
    x = 11,476,230,028.89/112,439.80
  6. Step 6: Final answer
    x = 102,065.55

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1.5x scale

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.