Home / 136,098.17-187,815.53-78,745.31

Finding the Fourth Proportional to 136,098.17, 187,815.53 and 78,745.31

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Solution

The fourth proportional to 136,098.17, 187,815.53 and 78,745.31 is: 108,668.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,098.17 : 187,815.53 = 78,745.31 : x
  2. Step 2: Convert to fraction form
    136,098.17/187,815.53 = 78,745.31/x
  3. Step 3: Cross multiply
    136,098.17x = 187,815.53 × 78,745.31
  4. Step 4: Simplify right side
    136,098.17x = 14,789,591,390.45
  5. Step 5: Solve for x
    x = 14,789,591,390.45/136,098.17
  6. Step 6: Final answer
    x = 108,668.56

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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.