Home / 125,286.87-187,986.18-57,782.61

Finding the Fourth Proportional to 125,286.87, 187,986.18 and 57,782.61

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Solution

The fourth proportional to 125,286.87, 187,986.18 and 57,782.61 is: 86,699.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,286.87 : 187,986.18 = 57,782.61 : x
  2. Step 2: Convert to fraction form
    125,286.87/187,986.18 = 57,782.61/x
  3. Step 3: Cross multiply
    125,286.87x = 187,986.18 × 57,782.61
  4. Step 4: Simplify right side
    125,286.87x = 10,862,332,124.33
  5. Step 5: Solve for x
    x = 10,862,332,124.33/125,286.87
  6. Step 6: Final answer
    x = 86,699.68

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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.