Home / 81,932.78-122,928.78-28,632.65

Finding the Fourth Proportional to 81,932.78, 122,928.78 and 28,632.65

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Solution

The fourth proportional to 81,932.78, 122,928.78 and 28,632.65 is: 42,959.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,932.78 : 122,928.78 = 28,632.65 : x
  2. Step 2: Convert to fraction form
    81,932.78/122,928.78 = 28,632.65/x
  3. Step 3: Cross multiply
    81,932.78x = 122,928.78 × 28,632.65
  4. Step 4: Simplify right side
    81,932.78x = 3,519,776,732.67
  5. Step 5: Solve for x
    x = 3,519,776,732.67/81,932.78
  6. Step 6: Final answer
    x = 42,959.32

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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.