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Finding the Fourth Proportional to 71,860.96, 99,164.16 and 40,029.28

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Solution

The fourth proportional to 71,860.96, 99,164.16 and 40,029.28 is: 55,238.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,860.96 : 99,164.16 = 40,029.28 : x
  2. Step 2: Convert to fraction form
    71,860.96/99,164.16 = 40,029.28/x
  3. Step 3: Cross multiply
    71,860.96x = 99,164.16 × 40,029.28
  4. Step 4: Simplify right side
    71,860.96x = 3,969,469,926.60
  5. Step 5: Solve for x
    x = 3,969,469,926.60/71,860.96
  6. Step 6: Final answer
    x = 55,238.20

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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.