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Finding the Fourth Proportional to 68,989.92, 103,411.20 and 39,343.92

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Solution

The fourth proportional to 68,989.92, 103,411.20 and 39,343.92 is: 58,973.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,989.92 : 103,411.20 = 39,343.92 : x
  2. Step 2: Convert to fraction form
    68,989.92/103,411.20 = 39,343.92/x
  3. Step 3: Cross multiply
    68,989.92x = 103,411.20 × 39,343.92
  4. Step 4: Simplify right side
    68,989.92x = 4,068,601,979.90
  5. Step 5: Solve for x
    x = 4,068,601,979.90/68,989.92
  6. Step 6: Final answer
    x = 58,973.86

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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.