Home / 100,520.24-138,725.00-66,469.56

Finding the Fourth Proportional to 100,520.24, 138,725.00 and 66,469.56

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Solution

The fourth proportional to 100,520.24, 138,725.00 and 66,469.56 is: 91,732.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,520.24 : 138,725.00 = 66,469.56 : x
  2. Step 2: Convert to fraction form
    100,520.24/138,725.00 = 66,469.56/x
  3. Step 3: Cross multiply
    100,520.24x = 138,725.00 × 66,469.56
  4. Step 4: Simplify right side
    100,520.24x = 9,220,989,378.65
  5. Step 5: Solve for x
    x = 9,220,989,378.65/100,520.24
  6. Step 6: Final answer
    x = 91,732.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.