Home / 72,408.06-99,918.09-40,142.43

Finding the Fourth Proportional to 72,408.06, 99,918.09 and 40,142.43

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Solution

The fourth proportional to 72,408.06, 99,918.09 and 40,142.43 is: 55,393.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,408.06 : 99,918.09 = 40,142.43 : x
  2. Step 2: Convert to fraction form
    72,408.06/99,918.09 = 40,142.43/x
  3. Step 3: Cross multiply
    72,408.06x = 99,918.09 × 40,142.43
  4. Step 4: Simplify right side
    72,408.06x = 4,010,954,933.56
  5. Step 5: Solve for x
    x = 4,010,954,933.56/72,408.06
  6. Step 6: Final answer
    x = 55,393.76

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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.