Home / 128,162.85-192,135.22-78,277.94

Finding the Fourth Proportional to 128,162.85, 192,135.22 and 78,277.94

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Solution

The fourth proportional to 128,162.85, 192,135.22 and 78,277.94 is: 117,350.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,162.85 : 192,135.22 = 78,277.94 : x
  2. Step 2: Convert to fraction form
    128,162.85/192,135.22 = 78,277.94/x
  3. Step 3: Cross multiply
    128,162.85x = 192,135.22 × 78,277.94
  4. Step 4: Simplify right side
    128,162.85x = 15,039,949,223.05
  5. Step 5: Solve for x
    x = 15,039,949,223.05/128,162.85
  6. Step 6: Final answer
    x = 117,350.30

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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.