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Finding the Fourth Proportional to 73,285.29, 109,934.42 and 39,991.05

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Solution

The fourth proportional to 73,285.29, 109,934.42 and 39,991.05 is: 59,990.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,285.29 : 109,934.42 = 39,991.05 : x
  2. Step 2: Convert to fraction form
    73,285.29/109,934.42 = 39,991.05/x
  3. Step 3: Cross multiply
    73,285.29x = 109,934.42 × 39,991.05
  4. Step 4: Simplify right side
    73,285.29x = 4,396,392,686.99
  5. Step 5: Solve for x
    x = 4,396,392,686.99/73,285.29
  6. Step 6: Final answer
    x = 59,990.11

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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.