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Finding the Fourth Proportional to 67,589.67, 101,385.90 and 20,842.50

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Solution

The fourth proportional to 67,589.67, 101,385.90 and 20,842.50 is: 31,264.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,589.67 : 101,385.90 = 20,842.50 : x
  2. Step 2: Convert to fraction form
    67,589.67/101,385.90 = 20,842.50/x
  3. Step 3: Cross multiply
    67,589.67x = 101,385.90 × 20,842.50
  4. Step 4: Simplify right side
    67,589.67x = 2,113,135,620.75
  5. Step 5: Solve for x
    x = 2,113,135,620.75/67,589.67
  6. Step 6: Final answer
    x = 31,264.18

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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.