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Finding the Fourth Proportional to 86,349.36, 129,540 and 33,755.52

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Solution

The fourth proportional to 86,349.36, 129,540 and 33,755.52 is: 50,639.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,349.36 : 129,540 = 33,755.52 : x
  2. Step 2: Convert to fraction form
    86,349.36/129,540 = 33,755.52/x
  3. Step 3: Cross multiply
    86,349.36x = 129,540 × 33,755.52
  4. Step 4: Simplify right side
    86,349.36x = 4,372,690,060.80
  5. Step 5: Solve for x
    x = 4,372,690,060.80/86,349.36
  6. Step 6: Final answer
    x = 50,639.52

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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.