Home / 207,986.72-311,979.84-83,415.20

Finding the Fourth Proportional to 207,986.72, 311,979.84 and 83,415.20

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Solution

The fourth proportional to 207,986.72, 311,979.84 and 83,415.20 is: 125,122.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,986.72 : 311,979.84 = 83,415.20 : x
  2. Step 2: Convert to fraction form
    207,986.72/311,979.84 = 83,415.20/x
  3. Step 3: Cross multiply
    207,986.72x = 311,979.84 × 83,415.20
  4. Step 4: Simplify right side
    207,986.72x = 26,023,860,749.57
  5. Step 5: Solve for x
    x = 26,023,860,749.57/207,986.72
  6. Step 6: Final answer
    x = 125,122.70

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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.