Home / 207,866.10-311,799.15-128,723.70

Finding the Fourth Proportional to 207,866.10, 311,799.15 and 128,723.70

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Solution

The fourth proportional to 207,866.10, 311,799.15 and 128,723.70 is: 193,085.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,866.10 : 311,799.15 = 128,723.70 : x
  2. Step 2: Convert to fraction form
    207,866.10/311,799.15 = 128,723.70/x
  3. Step 3: Cross multiply
    207,866.10x = 311,799.15 × 128,723.70
  4. Step 4: Simplify right side
    207,866.10x = 40,135,940,244.86
  5. Step 5: Solve for x
    x = 40,135,940,244.86/207,866.10
  6. Step 6: Final answer
    x = 193,085.55

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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.