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Finding the Fourth Proportional to 86,563.68, 129,896.28 and 36,640.68

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Solution

The fourth proportional to 86,563.68, 129,896.28 and 36,640.68 is: 54,982.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,563.68 : 129,896.28 = 36,640.68 : x
  2. Step 2: Convert to fraction form
    86,563.68/129,896.28 = 36,640.68/x
  3. Step 3: Cross multiply
    86,563.68x = 129,896.28 × 36,640.68
  4. Step 4: Simplify right side
    86,563.68x = 4,759,488,028.67
  5. Step 5: Solve for x
    x = 4,759,488,028.67/86,563.68
  6. Step 6: Final answer
    x = 54,982.51

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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.