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Finding the Fourth Proportional to 207,660.90, 311,491.35 and 67,419.53

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Solution

The fourth proportional to 207,660.90, 311,491.35 and 67,419.53 is: 101,129.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,660.90 : 311,491.35 = 67,419.53 : x
  2. Step 2: Convert to fraction form
    207,660.90/311,491.35 = 67,419.53/x
  3. Step 3: Cross multiply
    207,660.90x = 311,491.35 × 67,419.53
  4. Step 4: Simplify right side
    207,660.90x = 21,000,598,858.61
  5. Step 5: Solve for x
    x = 21,000,598,858.61/207,660.90
  6. Step 6: Final answer
    x = 101,129.29

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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.