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Finding the Fourth Proportional to 68,940.90, 103,335.21 and 35,662.86

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Solution

The fourth proportional to 68,940.90, 103,335.21 and 35,662.86 is: 53,454.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,940.90 : 103,335.21 = 35,662.86 : x
  2. Step 2: Convert to fraction form
    68,940.90/103,335.21 = 35,662.86/x
  3. Step 3: Cross multiply
    68,940.90x = 103,335.21 × 35,662.86
  4. Step 4: Simplify right side
    68,940.90x = 3,685,229,127.30
  5. Step 5: Solve for x
    x = 3,685,229,127.30/68,940.90
  6. Step 6: Final answer
    x = 53,454.90

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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.