Home / 128,309.44-192,451.78-39,539.11

Finding the Fourth Proportional to 128,309.44, 192,451.78 and 39,539.11

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Solution

The fourth proportional to 128,309.44, 192,451.78 and 39,539.11 is: 59,304.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,309.44 : 192,451.78 = 39,539.11 : x
  2. Step 2: Convert to fraction form
    128,309.44/192,451.78 = 39,539.11/x
  3. Step 3: Cross multiply
    128,309.44x = 192,451.78 × 39,539.11
  4. Step 4: Simplify right side
    128,309.44x = 7,609,372,099.12
  5. Step 5: Solve for x
    x = 7,609,372,099.12/128,309.44
  6. Step 6: Final answer
    x = 59,304.85

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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.