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Finding the Fourth Proportional to 109,096.80, 163,414.80 and 90,664.80

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Solution

The fourth proportional to 109,096.80, 163,414.80 and 90,664.80 is: 135,805.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,096.80 : 163,414.80 = 90,664.80 : x
  2. Step 2: Convert to fraction form
    109,096.80/163,414.80 = 90,664.80/x
  3. Step 3: Cross multiply
    109,096.80x = 163,414.80 × 90,664.80
  4. Step 4: Simplify right side
    109,096.80x = 14,815,970,159.04
  5. Step 5: Solve for x
    x = 14,815,970,159.04/109,096.80
  6. Step 6: Final answer
    x = 135,805.73

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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.