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Finding the Fourth Proportional to 69,969.60, 104,986.80 and 36,727.20

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Solution

The fourth proportional to 69,969.60, 104,986.80 and 36,727.20 is: 55,107.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,969.60 : 104,986.80 = 36,727.20 : x
  2. Step 2: Convert to fraction form
    69,969.60/104,986.80 = 36,727.20/x
  3. Step 3: Cross multiply
    69,969.60x = 104,986.80 × 36,727.20
  4. Step 4: Simplify right side
    69,969.60x = 3,855,871,200.96
  5. Step 5: Solve for x
    x = 3,855,871,200.96/69,969.60
  6. Step 6: Final answer
    x = 55,107.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.