Home / 81,279.42-121,888.87-27,956.43

Finding the Fourth Proportional to 81,279.42, 121,888.87 and 27,956.43

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Solution

The fourth proportional to 81,279.42, 121,888.87 and 27,956.43 is: 41,924.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,279.42 : 121,888.87 = 27,956.43 : x
  2. Step 2: Convert to fraction form
    81,279.42/121,888.87 = 27,956.43/x
  3. Step 3: Cross multiply
    81,279.42x = 121,888.87 × 27,956.43
  4. Step 4: Simplify right side
    81,279.42x = 3,407,577,661.93
  5. Step 5: Solve for x
    x = 3,407,577,661.93/81,279.42
  6. Step 6: Final answer
    x = 41,924.24

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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.