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Finding the Fourth Proportional to 67,665.88, 101,503.68 and 20,912.68

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Solution

The fourth proportional to 67,665.88, 101,503.68 and 20,912.68 is: 31,370.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,665.88 : 101,503.68 = 20,912.68 : x
  2. Step 2: Convert to fraction form
    67,665.88/101,503.68 = 20,912.68/x
  3. Step 3: Cross multiply
    67,665.88x = 101,503.68 × 20,912.68
  4. Step 4: Simplify right side
    67,665.88x = 2,122,713,978.66
  5. Step 5: Solve for x
    x = 2,122,713,978.66/67,665.88
  6. Step 6: Final answer
    x = 31,370.52

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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.