Home / 128,340.54-192,538.26-38,390.30

Finding the Fourth Proportional to 128,340.54, 192,538.26 and 38,390.30

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Solution

The fourth proportional to 128,340.54, 192,538.26 and 38,390.30 is: 57,593.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,340.54 : 192,538.26 = 38,390.30 : x
  2. Step 2: Convert to fraction form
    128,340.54/192,538.26 = 38,390.30/x
  3. Step 3: Cross multiply
    128,340.54x = 192,538.26 × 38,390.30
  4. Step 4: Simplify right side
    128,340.54x = 7,391,601,562.88
  5. Step 5: Solve for x
    x = 7,391,601,562.88/128,340.54
  6. Step 6: Final answer
    x = 57,593.66

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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.