Home / 207,905.20-311,857.80-123,705.70

Finding the Fourth Proportional to 207,905.20, 311,857.80 and 123,705.70

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Solution

The fourth proportional to 207,905.20, 311,857.80 and 123,705.70 is: 185,558.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,905.20 : 311,857.80 = 123,705.70 : x
  2. Step 2: Convert to fraction form
    207,905.20/311,857.80 = 123,705.70/x
  3. Step 3: Cross multiply
    207,905.20x = 311,857.80 × 123,705.70
  4. Step 4: Simplify right side
    207,905.20x = 38,578,587,449.46
  5. Step 5: Solve for x
    x = 38,578,587,449.46/207,905.20
  6. Step 6: Final answer
    x = 185,558.55

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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.