Home / 86,391.57-129,601.25-30,230.43

Finding the Fourth Proportional to 86,391.57, 129,601.25 and 30,230.43

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Solution

The fourth proportional to 86,391.57, 129,601.25 and 30,230.43 is: 45,350.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,391.57 : 129,601.25 = 30,230.43 : x
  2. Step 2: Convert to fraction form
    86,391.57/129,601.25 = 30,230.43/x
  3. Step 3: Cross multiply
    86,391.57x = 129,601.25 × 30,230.43
  4. Step 4: Simplify right side
    86,391.57x = 3,917,901,516.04
  5. Step 5: Solve for x
    x = 3,917,901,516.04/86,391.57
  6. Step 6: Final answer
    x = 45,350.51

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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.