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Finding the Fourth Proportional to 80,940.10, 121,410.15 and 72,483.70

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Solution

The fourth proportional to 80,940.10, 121,410.15 and 72,483.70 is: 108,725.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,940.10 : 121,410.15 = 72,483.70 : x
  2. Step 2: Convert to fraction form
    80,940.10/121,410.15 = 72,483.70/x
  3. Step 3: Cross multiply
    80,940.10x = 121,410.15 × 72,483.70
  4. Step 4: Simplify right side
    80,940.10x = 8,800,256,889.56
  5. Step 5: Solve for x
    x = 8,800,256,889.56/80,940.10
  6. Step 6: Final answer
    x = 108,725.55

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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.