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Finding the Fourth Proportional to 86,259.15, 129,311.78 and 33,656.40

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Solution

The fourth proportional to 86,259.15, 129,311.78 and 33,656.40 is: 50,454.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,259.15 : 129,311.78 = 33,656.40 : x
  2. Step 2: Convert to fraction form
    86,259.15/129,311.78 = 33,656.40/x
  3. Step 3: Cross multiply
    86,259.15x = 129,311.78 × 33,656.40
  4. Step 4: Simplify right side
    86,259.15x = 4,352,168,824.11
  5. Step 5: Solve for x
    x = 4,352,168,824.11/86,259.15
  6. Step 6: Final answer
    x = 50,454.58

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.