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Finding the Fourth Proportional to 154,489.80, 231,605.10 and 80,617.80

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Solution

The fourth proportional to 154,489.80, 231,605.10 and 80,617.80 is: 120,859.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,489.80 : 231,605.10 = 80,617.80 : x
  2. Step 2: Convert to fraction form
    154,489.80/231,605.10 = 80,617.80/x
  3. Step 3: Cross multiply
    154,489.80x = 231,605.10 × 80,617.80
  4. Step 4: Simplify right side
    154,489.80x = 18,671,493,630.78
  5. Step 5: Solve for x
    x = 18,671,493,630.78/154,489.80
  6. Step 6: Final answer
    x = 120,859.07

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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.