Home / 128,249.35-192,395.09-39,502.87

Finding the Fourth Proportional to 128,249.35, 192,395.09 and 39,502.87

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Solution

The fourth proportional to 128,249.35, 192,395.09 and 39,502.87 is: 59,260.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,249.35 : 192,395.09 = 39,502.87 : x
  2. Step 2: Convert to fraction form
    128,249.35/192,395.09 = 39,502.87/x
  3. Step 3: Cross multiply
    128,249.35x = 192,395.09 × 39,502.87
  4. Step 4: Simplify right side
    128,249.35x = 7,600,158,031.39
  5. Step 5: Solve for x
    x = 7,600,158,031.39/128,249.35
  6. Step 6: Final answer
    x = 59,260.79

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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.