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Finding the Fourth Proportional to 192,385.68, 288,631.76 and 80,118.72

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Solution

The fourth proportional to 192,385.68, 288,631.76 and 80,118.72 is: 120,200.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,385.68 : 288,631.76 = 80,118.72 : x
  2. Step 2: Convert to fraction form
    192,385.68/288,631.76 = 80,118.72/x
  3. Step 3: Cross multiply
    192,385.68x = 288,631.76 × 80,118.72
  4. Step 4: Simplify right side
    192,385.68x = 23,124,807,162.55
  5. Step 5: Solve for x
    x = 23,124,807,162.55/192,385.68
  6. Step 6: Final answer
    x = 120,200.25

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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.