Home / 128,145.10-192,217.65-57,067.60

Finding the Fourth Proportional to 128,145.10, 192,217.65 and 57,067.60

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Solution

The fourth proportional to 128,145.10, 192,217.65 and 57,067.60 is: 85,601.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.10 : 192,217.65 = 57,067.60 : x
  2. Step 2: Convert to fraction form
    128,145.10/192,217.65 = 57,067.60/x
  3. Step 3: Cross multiply
    128,145.10x = 192,217.65 × 57,067.60
  4. Step 4: Simplify right side
    128,145.10x = 10,969,399,963.14
  5. Step 5: Solve for x
    x = 10,969,399,963.14/128,145.10
  6. Step 6: Final answer
    x = 85,601.40

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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.