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Finding the Fourth Proportional to 230,661.78, 345,990.60 and 72,890.26

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Solution

The fourth proportional to 230,661.78, 345,990.60 and 72,890.26 is: 109,334.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,661.78 : 345,990.60 = 72,890.26 : x
  2. Step 2: Convert to fraction form
    230,661.78/345,990.60 = 72,890.26/x
  3. Step 3: Cross multiply
    230,661.78x = 345,990.60 × 72,890.26
  4. Step 4: Simplify right side
    230,661.78x = 25,219,344,791.56
  5. Step 5: Solve for x
    x = 25,219,344,791.56/230,661.78
  6. Step 6: Final answer
    x = 109,334.74

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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.