Home / 204,631.40-306,801.30-78,222.80

Finding the Fourth Proportional to 204,631.40, 306,801.30 and 78,222.80

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Solution

The fourth proportional to 204,631.40, 306,801.30 and 78,222.80 is: 117,278.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,631.40 : 306,801.30 = 78,222.80 : x
  2. Step 2: Convert to fraction form
    204,631.40/306,801.30 = 78,222.80/x
  3. Step 3: Cross multiply
    204,631.40x = 306,801.30 × 78,222.80
  4. Step 4: Simplify right side
    204,631.40x = 23,998,856,729.64
  5. Step 5: Solve for x
    x = 23,998,856,729.64/204,631.40
  6. Step 6: Final answer
    x = 117,278.47

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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.