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Finding the Fourth Proportional to 68,815.80, 103,223.70 and 37,711.80

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Solution

The fourth proportional to 68,815.80, 103,223.70 and 37,711.80 is: 56,567.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,815.80 : 103,223.70 = 37,711.80 : x
  2. Step 2: Convert to fraction form
    68,815.80/103,223.70 = 37,711.80/x
  3. Step 3: Cross multiply
    68,815.80x = 103,223.70 × 37,711.80
  4. Step 4: Simplify right side
    68,815.80x = 3,892,751,529.66
  5. Step 5: Solve for x
    x = 3,892,751,529.66/68,815.80
  6. Step 6: Final answer
    x = 56,567.70

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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.