Home / 207,962.40-311,942.58-81,513.30

Finding the Fourth Proportional to 207,962.40, 311,942.58 and 81,513.30

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Solution

The fourth proportional to 207,962.40, 311,942.58 and 81,513.30 is: 122,269.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,962.40 : 311,942.58 = 81,513.30 : x
  2. Step 2: Convert to fraction form
    207,962.40/311,942.58 = 81,513.30/x
  3. Step 3: Cross multiply
    207,962.40x = 311,942.58 × 81,513.30
  4. Step 4: Simplify right side
    207,962.40x = 25,427,469,106.31
  5. Step 5: Solve for x
    x = 25,427,469,106.31/207,962.40
  6. Step 6: Final answer
    x = 122,269.55

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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.