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Finding the Fourth Proportional to 207,425.28, 311,122.88 and 81,041.76

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Solution

The fourth proportional to 207,425.28, 311,122.88 and 81,041.76 is: 121,556.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,425.28 : 311,122.88 = 81,041.76 : x
  2. Step 2: Convert to fraction form
    207,425.28/311,122.88 = 81,041.76/x
  3. Step 3: Cross multiply
    207,425.28x = 311,122.88 × 81,041.76
  4. Step 4: Simplify right side
    207,425.28x = 25,213,945,771.47
  5. Step 5: Solve for x
    x = 25,213,945,771.47/207,425.28
  6. Step 6: Final answer
    x = 121,556.76

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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.