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Finding the Fourth Proportional to 68,236.20, 102,368.70 and 21,493.80

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Solution

The fourth proportional to 68,236.20, 102,368.70 and 21,493.80 is: 32,245.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,236.20 : 102,368.70 = 21,493.80 : x
  2. Step 2: Convert to fraction form
    68,236.20/102,368.70 = 21,493.80/x
  3. Step 3: Cross multiply
    68,236.20x = 102,368.70 × 21,493.80
  4. Step 4: Simplify right side
    68,236.20x = 2,200,292,364.06
  5. Step 5: Solve for x
    x = 2,200,292,364.06/68,236.20
  6. Step 6: Final answer
    x = 32,245.24

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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.