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Finding the Fourth Proportional to 73,912.64, 101,999.76 and 40,379.36

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Solution

The fourth proportional to 73,912.64, 101,999.76 and 40,379.36 is: 55,723.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,912.64 : 101,999.76 = 40,379.36 : x
  2. Step 2: Convert to fraction form
    73,912.64/101,999.76 = 40,379.36/x
  3. Step 3: Cross multiply
    73,912.64x = 101,999.76 × 40,379.36
  4. Step 4: Simplify right side
    73,912.64x = 4,118,685,028.95
  5. Step 5: Solve for x
    x = 4,118,685,028.95/73,912.64
  6. Step 6: Final answer
    x = 55,723.69

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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.