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Finding the Fourth Proportional to 86,137.88, 129,157.08 and 33,485.80

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Solution

The fourth proportional to 86,137.88, 129,157.08 and 33,485.80 is: 50,209.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,137.88 : 129,157.08 = 33,485.80 : x
  2. Step 2: Convert to fraction form
    86,137.88/129,157.08 = 33,485.80/x
  3. Step 3: Cross multiply
    86,137.88x = 129,157.08 × 33,485.80
  4. Step 4: Simplify right side
    86,137.88x = 4,324,928,149.46
  5. Step 5: Solve for x
    x = 4,324,928,149.46/86,137.88
  6. Step 6: Final answer
    x = 50,209.36

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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.