Home / 128,078.27-192,126.63-49,192.50

Finding the Fourth Proportional to 128,078.27, 192,126.63 and 49,192.50

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Solution

The fourth proportional to 128,078.27, 192,126.63 and 49,192.50 is: 73,792.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,078.27 : 192,126.63 = 49,192.50 : x
  2. Step 2: Convert to fraction form
    128,078.27/192,126.63 = 49,192.50/x
  3. Step 3: Cross multiply
    128,078.27x = 192,126.63 × 49,192.50
  4. Step 4: Simplify right side
    128,078.27x = 9,451,189,246.28
  5. Step 5: Solve for x
    x = 9,451,189,246.28/128,078.27
  6. Step 6: Final answer
    x = 73,792.29

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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.