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Finding the Fourth Proportional to 192,157.69, 288,080.77 and 79,921.90

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Solution

The fourth proportional to 192,157.69, 288,080.77 and 79,921.90 is: 119,818.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,157.69 : 288,080.77 = 79,921.90 : x
  2. Step 2: Convert to fraction form
    192,157.69/288,080.77 = 79,921.90/x
  3. Step 3: Cross multiply
    192,157.69x = 288,080.77 × 79,921.90
  4. Step 4: Simplify right side
    192,157.69x = 23,023,962,491.86
  5. Step 5: Solve for x
    x = 23,023,962,491.86/192,157.69
  6. Step 6: Final answer
    x = 119,818.06

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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.