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Finding the Fourth Proportional to 128,550.20, 192,744.30 and 53,722.40

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Solution

The fourth proportional to 128,550.20, 192,744.30 and 53,722.40 is: 80,549.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,550.20 : 192,744.30 = 53,722.40 : x
  2. Step 2: Convert to fraction form
    128,550.20/192,744.30 = 53,722.40/x
  3. Step 3: Cross multiply
    128,550.20x = 192,744.30 × 53,722.40
  4. Step 4: Simplify right side
    128,550.20x = 10,354,686,382.32
  5. Step 5: Solve for x
    x = 10,354,686,382.32/128,550.20
  6. Step 6: Final answer
    x = 80,549.75

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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.