Home / 128,478.56-192,736.33-39,738.96

Finding the Fourth Proportional to 128,478.56, 192,736.33 and 39,738.96

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Solution

The fourth proportional to 128,478.56, 192,736.33 and 39,738.96 is: 59,614.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,478.56 : 192,736.33 = 39,738.96 : x
  2. Step 2: Convert to fraction form
    128,478.56/192,736.33 = 39,738.96/x
  3. Step 3: Cross multiply
    128,478.56x = 192,736.33 × 39,738.96
  4. Step 4: Simplify right side
    128,478.56x = 7,659,141,209.07
  5. Step 5: Solve for x
    x = 7,659,141,209.07/128,478.56
  6. Step 6: Final answer
    x = 59,614.16

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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.