Home / 128,640.15-192,967.52-39,906.27

Finding the Fourth Proportional to 128,640.15, 192,967.52 and 39,906.27

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Solution

The fourth proportional to 128,640.15, 192,967.52 and 39,906.27 is: 59,861.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,640.15 : 192,967.52 = 39,906.27 : x
  2. Step 2: Convert to fraction form
    128,640.15/192,967.52 = 39,906.27/x
  3. Step 3: Cross multiply
    128,640.15x = 192,967.52 × 39,906.27
  4. Step 4: Simplify right side
    128,640.15x = 7,700,613,754.82
  5. Step 5: Solve for x
    x = 7,700,613,754.82/128,640.15
  6. Step 6: Final answer
    x = 59,861.67

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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.