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Finding the Fourth Proportional to 73,999.80, 111,218.40 and 72,687.60

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Solution

The fourth proportional to 73,999.80, 111,218.40 and 72,687.60 is: 109,246.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,999.80 : 111,218.40 = 72,687.60 : x
  2. Step 2: Convert to fraction form
    73,999.80/111,218.40 = 72,687.60/x
  3. Step 3: Cross multiply
    73,999.80x = 111,218.40 × 72,687.60
  4. Step 4: Simplify right side
    73,999.80x = 8,084,198,571.84
  5. Step 5: Solve for x
    x = 8,084,198,571.84/73,999.80
  6. Step 6: Final answer
    x = 109,246.22

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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.