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Finding the Fourth Proportional to 139,230.80, 192,138.68 and 75,568.60

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Solution

The fourth proportional to 139,230.80, 192,138.68 and 75,568.60 is: 104,284.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,230.80 : 192,138.68 = 75,568.60 : x
  2. Step 2: Convert to fraction form
    139,230.80/192,138.68 = 75,568.60/x
  3. Step 3: Cross multiply
    139,230.80x = 192,138.68 × 75,568.60
  4. Step 4: Simplify right side
    139,230.80x = 14,519,651,053.45
  5. Step 5: Solve for x
    x = 14,519,651,053.45/139,230.80
  6. Step 6: Final answer
    x = 104,284.76

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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.