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Finding the Fourth Proportional to 71,917.98, 99,230.31 and 43,224.54

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Solution

The fourth proportional to 71,917.98, 99,230.31 and 43,224.54 is: 59,639.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,917.98 : 99,230.31 = 43,224.54 : x
  2. Step 2: Convert to fraction form
    71,917.98/99,230.31 = 43,224.54/x
  3. Step 3: Cross multiply
    71,917.98x = 99,230.31 × 43,224.54
  4. Step 4: Simplify right side
    71,917.98x = 4,289,184,503.81
  5. Step 5: Solve for x
    x = 4,289,184,503.81/71,917.98
  6. Step 6: Final answer
    x = 59,639.95

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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.