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Finding the Fourth Proportional to 72,610.30, 108,918.65 and 41,019.90

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Solution

The fourth proportional to 72,610.30, 108,918.65 and 41,019.90 is: 61,531.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,610.30 : 108,918.65 = 41,019.90 : x
  2. Step 2: Convert to fraction form
    72,610.30/108,918.65 = 41,019.90/x
  3. Step 3: Cross multiply
    72,610.30x = 108,918.65 × 41,019.90
  4. Step 4: Simplify right side
    72,610.30x = 4,467,832,131.14
  5. Step 5: Solve for x
    x = 4,467,832,131.14/72,610.30
  6. Step 6: Final answer
    x = 61,531.66

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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.