Home / 128,139.42-192,224.53-53,310.21

Finding the Fourth Proportional to 128,139.42, 192,224.53 and 53,310.21

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Solution

The fourth proportional to 128,139.42, 192,224.53 and 53,310.21 is: 79,971.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,139.42 : 192,224.53 = 53,310.21 : x
  2. Step 2: Convert to fraction form
    128,139.42/192,224.53 = 53,310.21/x
  3. Step 3: Cross multiply
    128,139.42x = 192,224.53 × 53,310.21
  4. Step 4: Simplify right side
    128,139.42x = 10,247,529,107.38
  5. Step 5: Solve for x
    x = 10,247,529,107.38/128,139.42
  6. Step 6: Final answer
    x = 79,971.71

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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.