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Finding the Fourth Proportional to 128,469.95, 192,760.05 and 49,639.53

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Solution

The fourth proportional to 128,469.95, 192,760.05 and 49,639.53 is: 74,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,469.95 : 192,760.05 = 49,639.53 : x
  2. Step 2: Convert to fraction form
    128,469.95/192,760.05 = 49,639.53/x
  3. Step 3: Cross multiply
    128,469.95x = 192,760.05 × 49,639.53
  4. Step 4: Simplify right side
    128,469.95x = 9,568,519,193.77
  5. Step 5: Solve for x
    x = 9,568,519,193.77/128,469.95
  6. Step 6: Final answer
    x = 74,480.60

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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.