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Finding the Fourth Proportional to 67,809.80, 101,690.40 and 34,518.80

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Solution

The fourth proportional to 67,809.80, 101,690.40 and 34,518.80 is: 51,765.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,809.80 : 101,690.40 = 34,518.80 : x
  2. Step 2: Convert to fraction form
    67,809.80/101,690.40 = 34,518.80/x
  3. Step 3: Cross multiply
    67,809.80x = 101,690.40 × 34,518.80
  4. Step 4: Simplify right side
    67,809.80x = 3,510,230,579.52
  5. Step 5: Solve for x
    x = 3,510,230,579.52/67,809.80
  6. Step 6: Final answer
    x = 51,765.83

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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.