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Finding the Fourth Proportional to 71,850.74, 99,155.81 and 40,020.17

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Solution

The fourth proportional to 71,850.74, 99,155.81 and 40,020.17 is: 55,228.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,850.74 : 99,155.81 = 40,020.17 : x
  2. Step 2: Convert to fraction form
    71,850.74/99,155.81 = 40,020.17/x
  3. Step 3: Cross multiply
    71,850.74x = 99,155.81 × 40,020.17
  4. Step 4: Simplify right side
    71,850.74x = 3,968,231,976.96
  5. Step 5: Solve for x
    x = 3,968,231,976.96/71,850.74
  6. Step 6: Final answer
    x = 55,228.83

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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.