Home / 81,481.18-122,408.89-57,520.58

Finding the Fourth Proportional to 81,481.18, 122,408.89 and 57,520.58

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Solution

The fourth proportional to 81,481.18, 122,408.89 and 57,520.58 is: 86,412.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,481.18 : 122,408.89 = 57,520.58 : x
  2. Step 2: Convert to fraction form
    81,481.18/122,408.89 = 57,520.58/x
  3. Step 3: Cross multiply
    81,481.18x = 122,408.89 × 57,520.58
  4. Step 4: Simplify right side
    81,481.18x = 7,041,030,349.96
  5. Step 5: Solve for x
    x = 7,041,030,349.96/81,481.18
  6. Step 6: Final answer
    x = 86,412.96

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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.