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Finding the Fourth Proportional to 86,454.92, 129,693.71 and 33,857.57

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Solution

The fourth proportional to 86,454.92, 129,693.71 and 33,857.57 is: 50,790.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,454.92 : 129,693.71 = 33,857.57 : x
  2. Step 2: Convert to fraction form
    86,454.92/129,693.71 = 33,857.57/x
  3. Step 3: Cross multiply
    86,454.92x = 129,693.71 × 33,857.57
  4. Step 4: Simplify right side
    86,454.92x = 4,391,113,301.06
  5. Step 5: Solve for x
    x = 4,391,113,301.06/86,454.92
  6. Step 6: Final answer
    x = 50,790.79

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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.