Home / 128,665.68-192,975-35,170.56

Finding the Fourth Proportional to 128,665.68, 192,975 and 35,170.56

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Solution

The fourth proportional to 128,665.68, 192,975 and 35,170.56 is: 52,749.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,665.68 : 192,975 = 35,170.56 : x
  2. Step 2: Convert to fraction form
    128,665.68/192,975 = 35,170.56/x
  3. Step 3: Cross multiply
    128,665.68x = 192,975 × 35,170.56
  4. Step 4: Simplify right side
    128,665.68x = 6,787,038,816
  5. Step 5: Solve for x
    x = 6,787,038,816/128,665.68
  6. Step 6: Final answer
    x = 52,749.41

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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.