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Finding the Fourth Proportional to 68,809.20, 103,116.60 and 48,008.40

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Solution

The fourth proportional to 68,809.20, 103,116.60 and 48,008.40 is: 71,944.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,809.20 : 103,116.60 = 48,008.40 : x
  2. Step 2: Convert to fraction form
    68,809.20/103,116.60 = 48,008.40/x
  3. Step 3: Cross multiply
    68,809.20x = 103,116.60 × 48,008.40
  4. Step 4: Simplify right side
    68,809.20x = 4,950,462,979.44
  5. Step 5: Solve for x
    x = 4,950,462,979.44/68,809.20
  6. Step 6: Final answer
    x = 71,944.78

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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.