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Finding the Fourth Proportional to 68,709.80, 103,064.70 and 47,714.60

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Solution

The fourth proportional to 68,709.80, 103,064.70 and 47,714.60 is: 71,571.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,709.80 : 103,064.70 = 47,714.60 : x
  2. Step 2: Convert to fraction form
    68,709.80/103,064.70 = 47,714.60/x
  3. Step 3: Cross multiply
    68,709.80x = 103,064.70 × 47,714.60
  4. Step 4: Simplify right side
    68,709.80x = 4,917,690,934.62
  5. Step 5: Solve for x
    x = 4,917,690,934.62/68,709.80
  6. Step 6: Final answer
    x = 71,571.90

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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.