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Finding the Fourth Proportional to 86,120.88, 129,240.36 and 33,530.64

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Solution

The fourth proportional to 86,120.88, 129,240.36 and 33,530.64 is: 50,318.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,120.88 : 129,240.36 = 33,530.64 : x
  2. Step 2: Convert to fraction form
    86,120.88/129,240.36 = 33,530.64/x
  3. Step 3: Cross multiply
    86,120.88x = 129,240.36 × 33,530.64
  4. Step 4: Simplify right side
    86,120.88x = 4,333,511,984.63
  5. Step 5: Solve for x
    x = 4,333,511,984.63/86,120.88
  6. Step 6: Final answer
    x = 50,318.95

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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.