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Finding the Fourth Proportional to 81,076.68, 111,824.25 and 69,765.13

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Solution

The fourth proportional to 81,076.68, 111,824.25 and 69,765.13 is: 96,222.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,076.68 : 111,824.25 = 69,765.13 : x
  2. Step 2: Convert to fraction form
    81,076.68/111,824.25 = 69,765.13/x
  3. Step 3: Cross multiply
    81,076.68x = 111,824.25 × 69,765.13
  4. Step 4: Simplify right side
    81,076.68x = 7,801,433,216.56
  5. Step 5: Solve for x
    x = 7,801,433,216.56/81,076.68
  6. Step 6: Final answer
    x = 96,222.90

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1.5x scale

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.