Home / 207,917.20-311,875.80-129,185.20

Finding the Fourth Proportional to 207,917.20, 311,875.80 and 129,185.20

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Solution

The fourth proportional to 207,917.20, 311,875.80 and 129,185.20 is: 193,777.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,917.20 : 311,875.80 = 129,185.20 : x
  2. Step 2: Convert to fraction form
    207,917.20/311,875.80 = 129,185.20/x
  3. Step 3: Cross multiply
    207,917.20x = 311,875.80 × 129,185.20
  4. Step 4: Simplify right side
    207,917.20x = 40,289,737,598.16
  5. Step 5: Solve for x
    x = 40,289,737,598.16/207,917.20
  6. Step 6: Final answer
    x = 193,777.80

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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.