Home / 81,278.42-121,887.38-27,955.43

Finding the Fourth Proportional to 81,278.42, 121,887.38 and 27,955.43

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Solution

The fourth proportional to 81,278.42, 121,887.38 and 27,955.43 is: 41,922.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,278.42 : 121,887.38 = 27,955.43 : x
  2. Step 2: Convert to fraction form
    81,278.42/121,887.38 = 27,955.43/x
  3. Step 3: Cross multiply
    81,278.42x = 121,887.38 × 27,955.43
  4. Step 4: Simplify right side
    81,278.42x = 3,407,413,370.26
  5. Step 5: Solve for x
    x = 3,407,413,370.26/81,278.42
  6. Step 6: Final answer
    x = 41,922.73

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1.5x scale

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.