Home / 207,491.28-311,243.16-81,126.48

Finding the Fourth Proportional to 207,491.28, 311,243.16 and 81,126.48

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Solution

The fourth proportional to 207,491.28, 311,243.16 and 81,126.48 is: 121,692.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,491.28 : 311,243.16 = 81,126.48 : x
  2. Step 2: Convert to fraction form
    207,491.28/311,243.16 = 81,126.48/x
  3. Step 3: Cross multiply
    207,491.28x = 311,243.16 × 81,126.48
  4. Step 4: Simplify right side
    207,491.28x = 25,250,061,994.88
  5. Step 5: Solve for x
    x = 25,250,061,994.88/207,491.28
  6. Step 6: Final answer
    x = 121,692.16

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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.