Home / 128,008.32-192,039.78-49,121.88

Finding the Fourth Proportional to 128,008.32, 192,039.78 and 49,121.88

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Solution

The fourth proportional to 128,008.32, 192,039.78 and 49,121.88 is: 73,693.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,008.32 : 192,039.78 = 49,121.88 : x
  2. Step 2: Convert to fraction form
    128,008.32/192,039.78 = 49,121.88/x
  3. Step 3: Cross multiply
    128,008.32x = 192,039.78 × 49,121.88
  4. Step 4: Simplify right side
    128,008.32x = 9,433,355,028.39
  5. Step 5: Solve for x
    x = 9,433,355,028.39/128,008.32
  6. Step 6: Final answer
    x = 73,693.30

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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.