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Finding the Fourth Proportional to 71,992.74, 99,349.29 and 39,727.65

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Solution

The fourth proportional to 71,992.74, 99,349.29 and 39,727.65 is: 54,823.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,992.74 : 99,349.29 = 39,727.65 : x
  2. Step 2: Convert to fraction form
    71,992.74/99,349.29 = 39,727.65/x
  3. Step 3: Cross multiply
    71,992.74x = 99,349.29 × 39,727.65
  4. Step 4: Simplify right side
    71,992.74x = 3,946,913,820.87
  5. Step 5: Solve for x
    x = 3,946,913,820.87/71,992.74
  6. Step 6: Final answer
    x = 54,823.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.