Home / 128,320.38-192,513.78-39,571.92

Finding the Fourth Proportional to 128,320.38, 192,513.78 and 39,571.92

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Solution

The fourth proportional to 128,320.38, 192,513.78 and 39,571.92 is: 59,368.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,320.38 : 192,513.78 = 39,571.92 : x
  2. Step 2: Convert to fraction form
    128,320.38/192,513.78 = 39,571.92/x
  3. Step 3: Cross multiply
    128,320.38x = 192,513.78 × 39,571.92
  4. Step 4: Simplify right side
    128,320.38x = 7,618,139,901.06
  5. Step 5: Solve for x
    x = 7,618,139,901.06/128,320.38
  6. Step 6: Final answer
    x = 59,368.12

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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.