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Finding the Fourth Proportional to 71,908.74, 99,234.16 and 43,228.71

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Solution

The fourth proportional to 71,908.74, 99,234.16 and 43,228.71 is: 59,655.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,908.74 : 99,234.16 = 43,228.71 : x
  2. Step 2: Convert to fraction form
    71,908.74/99,234.16 = 43,228.71/x
  3. Step 3: Cross multiply
    71,908.74x = 99,234.16 × 43,228.71
  4. Step 4: Simplify right side
    71,908.74x = 4,289,764,616.66
  5. Step 5: Solve for x
    x = 4,289,764,616.66/71,908.74
  6. Step 6: Final answer
    x = 59,655.68

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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.