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Finding the Fourth Proportional to 71,836.72, 107,636.28 and 36,728.08

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Solution

The fourth proportional to 71,836.72, 107,636.28 and 36,728.08 is: 55,031.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,836.72 : 107,636.28 = 36,728.08 : x
  2. Step 2: Convert to fraction form
    71,836.72/107,636.28 = 36,728.08/x
  3. Step 3: Cross multiply
    71,836.72x = 107,636.28 × 36,728.08
  4. Step 4: Simplify right side
    71,836.72x = 3,953,273,902.74
  5. Step 5: Solve for x
    x = 3,953,273,902.74/71,836.72
  6. Step 6: Final answer
    x = 55,031.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.