Home / 81,640.11-112,710.18-54,408.96

Finding the Fourth Proportional to 81,640.11, 112,710.18 and 54,408.96

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Solution

The fourth proportional to 81,640.11, 112,710.18 and 54,408.96 is: 75,115.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,640.11 : 112,710.18 = 54,408.96 : x
  2. Step 2: Convert to fraction form
    81,640.11/112,710.18 = 54,408.96/x
  3. Step 3: Cross multiply
    81,640.11x = 112,710.18 × 54,408.96
  4. Step 4: Simplify right side
    81,640.11x = 6,132,443,675.21
  5. Step 5: Solve for x
    x = 6,132,443,675.21/81,640.11
  6. Step 6: Final answer
    x = 75,115.57

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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.