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Finding the Fourth Proportional to 71,898.26, 99,221.64 and 40,066.88

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Solution

The fourth proportional to 71,898.26, 99,221.64 and 40,066.88 is: 55,293.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,898.26 : 99,221.64 = 40,066.88 : x
  2. Step 2: Convert to fraction form
    71,898.26/99,221.64 = 40,066.88/x
  3. Step 3: Cross multiply
    71,898.26x = 99,221.64 × 40,066.88
  4. Step 4: Simplify right side
    71,898.26x = 3,975,501,543.28
  5. Step 5: Solve for x
    x = 3,975,501,543.28/71,898.26
  6. Step 6: Final answer
    x = 55,293.43

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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.