Home / 81,918.09-122,906.72-28,617.95

Finding the Fourth Proportional to 81,918.09, 122,906.72 and 28,617.95

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Solution

The fourth proportional to 81,918.09, 122,906.72 and 28,617.95 is: 42,937.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,918.09 : 122,906.72 = 28,617.95 : x
  2. Step 2: Convert to fraction form
    81,918.09/122,906.72 = 28,617.95/x
  3. Step 3: Cross multiply
    81,918.09x = 122,906.72 × 28,617.95
  4. Step 4: Simplify right side
    81,918.09x = 3,517,337,610.00
  5. Step 5: Solve for x
    x = 3,517,337,610.00/81,918.09
  6. Step 6: Final answer
    x = 42,937.25

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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.