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Finding the Fourth Proportional to 128,392.69, 192,484.69 and 53,568.58

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Solution

The fourth proportional to 128,392.69, 192,484.69 and 53,568.58 is: 80,309.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,392.69 : 192,484.69 = 53,568.58 : x
  2. Step 2: Convert to fraction form
    128,392.69/192,484.69 = 53,568.58/x
  3. Step 3: Cross multiply
    128,392.69x = 192,484.69 × 53,568.58
  4. Step 4: Simplify right side
    128,392.69x = 10,311,131,515.04
  5. Step 5: Solve for x
    x = 10,311,131,515.04/128,392.69
  6. Step 6: Final answer
    x = 80,309.33

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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.