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Finding the Fourth Proportional to 71,900.10, 99,223.11 and 40,067.91

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Solution

The fourth proportional to 71,900.10, 99,223.11 and 40,067.91 is: 55,294.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,900.10 : 99,223.11 = 40,067.91 : x
  2. Step 2: Convert to fraction form
    71,900.10/99,223.11 = 40,067.91/x
  3. Step 3: Cross multiply
    71,900.10x = 99,223.11 × 40,067.91
  4. Step 4: Simplify right side
    71,900.10x = 3,975,662,641.40
  5. Step 5: Solve for x
    x = 3,975,662,641.40/71,900.10
  6. Step 6: Final answer
    x = 55,294.26

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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.