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Finding the Fourth Proportional to 81,182.77, 111,959.43 and 67,615.86

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Solution

The fourth proportional to 81,182.77, 111,959.43 and 67,615.86 is: 93,249.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,182.77 : 111,959.43 = 67,615.86 : x
  2. Step 2: Convert to fraction form
    81,182.77/111,959.43 = 67,615.86/x
  3. Step 3: Cross multiply
    81,182.77x = 111,959.43 × 67,615.86
  4. Step 4: Simplify right side
    81,182.77x = 7,570,232,584.76
  5. Step 5: Solve for x
    x = 7,570,232,584.76/81,182.77
  6. Step 6: Final answer
    x = 93,249.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.