Home / 81,182.96-121,774.59-31,286.55

Finding the Fourth Proportional to 81,182.96, 121,774.59 and 31,286.55

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Solution

The fourth proportional to 81,182.96, 121,774.59 and 31,286.55 is: 46,929.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,182.96 : 121,774.59 = 31,286.55 : x
  2. Step 2: Convert to fraction form
    81,182.96/121,774.59 = 31,286.55/x
  3. Step 3: Cross multiply
    81,182.96x = 121,774.59 × 31,286.55
  4. Step 4: Simplify right side
    81,182.96x = 3,809,907,255.42
  5. Step 5: Solve for x
    x = 3,809,907,255.42/81,182.96
  6. Step 6: Final answer
    x = 46,929.89

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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.