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Finding the Fourth Proportional to 86,455.92, 129,695.21 and 33,858.57

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Solution

The fourth proportional to 86,455.92, 129,695.21 and 33,858.57 is: 50,792.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,455.92 : 129,695.21 = 33,858.57 : x
  2. Step 2: Convert to fraction form
    86,455.92/129,695.21 = 33,858.57/x
  3. Step 3: Cross multiply
    86,455.92x = 129,695.21 × 33,858.57
  4. Step 4: Simplify right side
    86,455.92x = 4,391,294,346.45
  5. Step 5: Solve for x
    x = 4,391,294,346.45/86,455.92
  6. Step 6: Final answer
    x = 50,792.29

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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.