Home / 207,708.20-311,562.30-128,911.40

Finding the Fourth Proportional to 207,708.20, 311,562.30 and 128,911.40

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Solution

The fourth proportional to 207,708.20, 311,562.30 and 128,911.40 is: 193,367.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,708.20 : 311,562.30 = 128,911.40 : x
  2. Step 2: Convert to fraction form
    207,708.20/311,562.30 = 128,911.40/x
  3. Step 3: Cross multiply
    207,708.20x = 311,562.30 × 128,911.40
  4. Step 4: Simplify right side
    207,708.20x = 40,163,932,280.22
  5. Step 5: Solve for x
    x = 40,163,932,280.22/207,708.20
  6. Step 6: Final answer
    x = 193,367.10

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.