Home / 45,869.80-68,772.30-20,921.80

Finding the Fourth Proportional to 45,869.80, 68,772.30 and 20,921.80

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Solution

The fourth proportional to 45,869.80, 68,772.30 and 20,921.80 is: 31,367.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,869.80 : 68,772.30 = 20,921.80 : x
  2. Step 2: Convert to fraction form
    45,869.80/68,772.30 = 20,921.80/x
  3. Step 3: Cross multiply
    45,869.80x = 68,772.30 × 20,921.80
  4. Step 4: Simplify right side
    45,869.80x = 1,438,840,306.14
  5. Step 5: Solve for x
    x = 1,438,840,306.14/45,869.80
  6. Step 6: Final answer
    x = 31,367.92

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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.