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Finding the Fourth Proportional to 192,069.70, 288,104.55 and 81,247.30

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Solution

The fourth proportional to 192,069.70, 288,104.55 and 81,247.30 is: 121,870.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,069.70 : 288,104.55 = 81,247.30 : x
  2. Step 2: Convert to fraction form
    192,069.70/288,104.55 = 81,247.30/x
  3. Step 3: Cross multiply
    192,069.70x = 288,104.55 × 81,247.30
  4. Step 4: Simplify right side
    192,069.70x = 23,407,716,805.22
  5. Step 5: Solve for x
    x = 23,407,716,805.22/192,069.70
  6. Step 6: Final answer
    x = 121,870.95

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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.