Home / 83,936.40-125,890.20-31,318.80

Finding the Fourth Proportional to 83,936.40, 125,890.20 and 31,318.80

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Solution

The fourth proportional to 83,936.40, 125,890.20 and 31,318.80 is: 46,972.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,936.40 : 125,890.20 = 31,318.80 : x
  2. Step 2: Convert to fraction form
    83,936.40/125,890.20 = 31,318.80/x
  3. Step 3: Cross multiply
    83,936.40x = 125,890.20 × 31,318.80
  4. Step 4: Simplify right side
    83,936.40x = 3,942,729,995.76
  5. Step 5: Solve for x
    x = 3,942,729,995.76/83,936.40
  6. Step 6: Final answer
    x = 46,972.83

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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.