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Finding the Fourth Proportional to 128,378.25, 192,520.15 and 44,114.49

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Solution

The fourth proportional to 128,378.25, 192,520.15 and 44,114.49 is: 66,155.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,378.25 : 192,520.15 = 44,114.49 : x
  2. Step 2: Convert to fraction form
    128,378.25/192,520.15 = 44,114.49/x
  3. Step 3: Cross multiply
    128,378.25x = 192,520.15 × 44,114.49
  4. Step 4: Simplify right side
    128,378.25x = 8,492,928,121.69
  5. Step 5: Solve for x
    x = 8,492,928,121.69/128,378.25
  6. Step 6: Final answer
    x = 66,155.51

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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.