Home / 71,991.55-99,351.05-40,166.60

Finding the Fourth Proportional to 71,991.55, 99,351.05 and 40,166.60

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Solution

The fourth proportional to 71,991.55, 99,351.05 and 40,166.60 is: 55,431.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,991.55 : 99,351.05 = 40,166.60 : x
  2. Step 2: Convert to fraction form
    71,991.55/99,351.05 = 40,166.60/x
  3. Step 3: Cross multiply
    71,991.55x = 99,351.05 × 40,166.60
  4. Step 4: Simplify right side
    71,991.55x = 3,990,593,187.34
  5. Step 5: Solve for x
    x = 3,990,593,187.34/71,991.55
  6. Step 6: Final answer
    x = 55,431.41

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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.