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Finding the Fourth Proportional to 86,043.60, 129,015.28 and 33,391.58

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Solution

The fourth proportional to 86,043.60, 129,015.28 and 33,391.58 is: 50,067.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,043.60 : 129,015.28 = 33,391.58 : x
  2. Step 2: Convert to fraction form
    86,043.60/129,015.28 = 33,391.58/x
  3. Step 3: Cross multiply
    86,043.60x = 129,015.28 × 33,391.58
  4. Step 4: Simplify right side
    86,043.60x = 4,308,023,440.01
  5. Step 5: Solve for x
    x = 4,308,023,440.01/86,043.60
  6. Step 6: Final answer
    x = 50,067.91

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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.