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Finding the Fourth Proportional to 128,043.74, 192,039.10 and 38,086.96

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Solution

The fourth proportional to 128,043.74, 192,039.10 and 38,086.96 is: 57,122.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,043.74 : 192,039.10 = 38,086.96 : x
  2. Step 2: Convert to fraction form
    128,043.74/192,039.10 = 38,086.96/x
  3. Step 3: Cross multiply
    128,043.74x = 192,039.10 × 38,086.96
  4. Step 4: Simplify right side
    128,043.74x = 7,314,185,520.14
  5. Step 5: Solve for x
    x = 7,314,185,520.14/128,043.74
  6. Step 6: Final answer
    x = 57,122.55

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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.