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Finding the Fourth Proportional to 68,399.40, 102,512.70 and 49,909.80

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Solution

The fourth proportional to 68,399.40, 102,512.70 and 49,909.80 is: 74,801.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,399.40 : 102,512.70 = 49,909.80 : x
  2. Step 2: Convert to fraction form
    68,399.40/102,512.70 = 49,909.80/x
  3. Step 3: Cross multiply
    68,399.40x = 102,512.70 × 49,909.80
  4. Step 4: Simplify right side
    68,399.40x = 5,116,388,354.46
  5. Step 5: Solve for x
    x = 5,116,388,354.46/68,399.40
  6. Step 6: Final answer
    x = 74,801.66

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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.