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Finding the Fourth Proportional to 67,495.80, 101,243.64 and 20,748.60

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Solution

The fourth proportional to 67,495.80, 101,243.64 and 20,748.60 is: 31,122.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,495.80 : 101,243.64 = 20,748.60 : x
  2. Step 2: Convert to fraction form
    67,495.80/101,243.64 = 20,748.60/x
  3. Step 3: Cross multiply
    67,495.80x = 101,243.64 × 20,748.60
  4. Step 4: Simplify right side
    67,495.80x = 2,100,663,788.90
  5. Step 5: Solve for x
    x = 2,100,663,788.90/67,495.80
  6. Step 6: Final answer
    x = 31,122.88

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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.