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Finding the Fourth Proportional to 120,571.88, 180,859.36 and 83,121.94

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Solution

The fourth proportional to 120,571.88, 180,859.36 and 83,121.94 is: 124,683.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,571.88 : 180,859.36 = 83,121.94 : x
  2. Step 2: Convert to fraction form
    120,571.88/180,859.36 = 83,121.94/x
  3. Step 3: Cross multiply
    120,571.88x = 180,859.36 × 83,121.94
  4. Step 4: Simplify right side
    120,571.88x = 15,033,380,870.36
  5. Step 5: Solve for x
    x = 15,033,380,870.36/120,571.88
  6. Step 6: Final answer
    x = 124,683.97

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1.5x scale

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.