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Finding the Fourth Proportional to 128,249.88, 192,384.48 and 38,285.48

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Solution

The fourth proportional to 128,249.88, 192,384.48 and 38,285.48 is: 57,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,249.88 : 192,384.48 = 38,285.48 : x
  2. Step 2: Convert to fraction form
    128,249.88/192,384.48 = 38,285.48/x
  3. Step 3: Cross multiply
    128,249.88x = 192,384.48 × 38,285.48
  4. Step 4: Simplify right side
    128,249.88x = 7,365,532,161.35
  5. Step 5: Solve for x
    x = 7,365,532,161.35/128,249.88
  6. Step 6: Final answer
    x = 57,431.10

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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.