Home / 100,571.23-138,772.89-58,121.57

Finding the Fourth Proportional to 100,571.23, 138,772.89 and 58,121.57

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Solution

The fourth proportional to 100,571.23, 138,772.89 and 58,121.57 is: 80,198.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,571.23 : 138,772.89 = 58,121.57 : x
  2. Step 2: Convert to fraction form
    100,571.23/138,772.89 = 58,121.57/x
  3. Step 3: Cross multiply
    100,571.23x = 138,772.89 × 58,121.57
  4. Step 4: Simplify right side
    100,571.23x = 8,065,697,949.63
  5. Step 5: Solve for x
    x = 8,065,697,949.63/100,571.23
  6. Step 6: Final answer
    x = 80,198.86

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1.5x scale

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.