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Finding the Fourth Proportional to 71,873.71, 99,185.70 and 40,044.64

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Solution

The fourth proportional to 71,873.71, 99,185.70 and 40,044.64 is: 55,261.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,873.71 : 99,185.70 = 40,044.64 : x
  2. Step 2: Convert to fraction form
    71,873.71/99,185.70 = 40,044.64/x
  3. Step 3: Cross multiply
    71,873.71x = 99,185.70 × 40,044.64
  4. Step 4: Simplify right side
    71,873.71x = 3,971,855,649.65
  5. Step 5: Solve for x
    x = 3,971,855,649.65/71,873.71
  6. Step 6: Final answer
    x = 55,261.59

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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.