Home / 135,454.14-186,928.08-81,728.78

Finding the Fourth Proportional to 135,454.14, 186,928.08 and 81,728.78

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Solution

The fourth proportional to 135,454.14, 186,928.08 and 81,728.78 is: 112,786.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,454.14 : 186,928.08 = 81,728.78 : x
  2. Step 2: Convert to fraction form
    135,454.14/186,928.08 = 81,728.78/x
  3. Step 3: Cross multiply
    135,454.14x = 186,928.08 × 81,728.78
  4. Step 4: Simplify right side
    135,454.14x = 15,277,403,926.14
  5. Step 5: Solve for x
    x = 15,277,403,926.14/135,454.14
  6. Step 6: Final answer
    x = 112,786.54

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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.