Home / 138,664.20-191,356.20-78,234.60

Finding the Fourth Proportional to 138,664.20, 191,356.20 and 78,234.60

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Solution

The fourth proportional to 138,664.20, 191,356.20 and 78,234.60 is: 107,963.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,664.20 : 191,356.20 = 78,234.60 : x
  2. Step 2: Convert to fraction form
    138,664.20/191,356.20 = 78,234.60/x
  3. Step 3: Cross multiply
    138,664.20x = 191,356.20 × 78,234.60
  4. Step 4: Simplify right side
    138,664.20x = 14,970,675,764.52
  5. Step 5: Solve for x
    x = 14,970,675,764.52/138,664.20
  6. Step 6: Final answer
    x = 107,963.52

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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.