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Finding the Fourth Proportional to 128,321.81, 192,480.60 and 38,364.73

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Solution

The fourth proportional to 128,321.81, 192,480.60 and 38,364.73 is: 57,546.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,321.81 : 192,480.60 = 38,364.73 : x
  2. Step 2: Convert to fraction form
    128,321.81/192,480.60 = 38,364.73/x
  3. Step 3: Cross multiply
    128,321.81x = 192,480.60 × 38,364.73
  4. Step 4: Simplify right side
    128,321.81x = 7,384,466,129.55
  5. Step 5: Solve for x
    x = 7,384,466,129.55/128,321.81
  6. Step 6: Final answer
    x = 57,546.46

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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.