Home / 81,709.12-112,766.75-54,907.44

Finding the Fourth Proportional to 81,709.12, 112,766.75 and 54,907.44

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Solution

The fourth proportional to 81,709.12, 112,766.75 and 54,907.44 is: 75,777.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,709.12 : 112,766.75 = 54,907.44 : x
  2. Step 2: Convert to fraction form
    81,709.12/112,766.75 = 54,907.44/x
  3. Step 3: Cross multiply
    81,709.12x = 112,766.75 × 54,907.44
  4. Step 4: Simplify right side
    81,709.12x = 6,191,733,559.62
  5. Step 5: Solve for x
    x = 6,191,733,559.62/81,709.12
  6. Step 6: Final answer
    x = 75,777.75

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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.