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Finding the Fourth Proportional to 68,991.92, 103,414.20 and 39,345.92

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Solution

The fourth proportional to 68,991.92, 103,414.20 and 39,345.92 is: 58,976.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,991.92 : 103,414.20 = 39,345.92 : x
  2. Step 2: Convert to fraction form
    68,991.92/103,414.20 = 39,345.92/x
  3. Step 3: Cross multiply
    68,991.92x = 103,414.20 × 39,345.92
  4. Step 4: Simplify right side
    68,991.92x = 4,068,926,840.06
  5. Step 5: Solve for x
    x = 4,068,926,840.06/68,991.92
  6. Step 6: Final answer
    x = 58,976.86

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1.5x scale

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.