Home / 128,226.78-192,362.31-57,174.66

Finding the Fourth Proportional to 128,226.78, 192,362.31 and 57,174.66

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Solution

The fourth proportional to 128,226.78, 192,362.31 and 57,174.66 is: 85,771.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,226.78 : 192,362.31 = 57,174.66 : x
  2. Step 2: Convert to fraction form
    128,226.78/192,362.31 = 57,174.66/x
  3. Step 3: Cross multiply
    128,226.78x = 192,362.31 × 57,174.66
  4. Step 4: Simplify right side
    128,226.78x = 10,998,249,671.06
  5. Step 5: Solve for x
    x = 10,998,249,671.06/128,226.78
  6. Step 6: Final answer
    x = 85,771.86

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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.