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Finding the Fourth Proportional to 230,406.80, 345,658.80 and 72,651.20

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Solution

The fourth proportional to 230,406.80, 345,658.80 and 72,651.20 is: 108,992.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,406.80 : 345,658.80 = 72,651.20 : x
  2. Step 2: Convert to fraction form
    230,406.80/345,658.80 = 72,651.20/x
  3. Step 3: Cross multiply
    230,406.80x = 345,658.80 × 72,651.20
  4. Step 4: Simplify right side
    230,406.80x = 25,112,526,610.56
  5. Step 5: Solve for x
    x = 25,112,526,610.56/230,406.80
  6. Step 6: Final answer
    x = 108,992.12

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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.