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Finding the Fourth Proportional to 71,996.76, 99,355.22 and 40,165.68

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Solution

The fourth proportional to 71,996.76, 99,355.22 and 40,165.68 is: 55,428.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,996.76 : 99,355.22 = 40,165.68 : x
  2. Step 2: Convert to fraction form
    71,996.76/99,355.22 = 40,165.68/x
  3. Step 3: Cross multiply
    71,996.76x = 99,355.22 × 40,165.68
  4. Step 4: Simplify right side
    71,996.76x = 3,990,669,972.85
  5. Step 5: Solve for x
    x = 3,990,669,972.85/71,996.76
  6. Step 6: Final answer
    x = 55,428.47

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1.5x scale

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.