Home / 128,439.03-192,448.16-68,403.77

Finding the Fourth Proportional to 128,439.03, 192,448.16 and 68,403.77

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Solution

The fourth proportional to 128,439.03, 192,448.16 and 68,403.77 is: 102,493.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,439.03 : 192,448.16 = 68,403.77 : x
  2. Step 2: Convert to fraction form
    128,439.03/192,448.16 = 68,403.77/x
  3. Step 3: Cross multiply
    128,439.03x = 192,448.16 × 68,403.77
  4. Step 4: Simplify right side
    128,439.03x = 13,164,179,732.27
  5. Step 5: Solve for x
    x = 13,164,179,732.27/128,439.03
  6. Step 6: Final answer
    x = 102,493.61

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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.