Home / 135,243.48-186,560.94-78,648.60

Finding the Fourth Proportional to 135,243.48, 186,560.94 and 78,648.60

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Solution

The fourth proportional to 135,243.48, 186,560.94 and 78,648.60 is: 108,491.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,243.48 : 186,560.94 = 78,648.60 : x
  2. Step 2: Convert to fraction form
    135,243.48/186,560.94 = 78,648.60/x
  3. Step 3: Cross multiply
    135,243.48x = 186,560.94 × 78,648.60
  4. Step 4: Simplify right side
    135,243.48x = 14,672,756,745.68
  5. Step 5: Solve for x
    x = 14,672,756,745.68/135,243.48
  6. Step 6: Final answer
    x = 108,491.42

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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.