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Finding the Fourth Proportional to 80,879.60, 121,319.40 and 73,492.40

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Solution

The fourth proportional to 80,879.60, 121,319.40 and 73,492.40 is: 110,238.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,879.60 : 121,319.40 = 73,492.40 : x
  2. Step 2: Convert to fraction form
    80,879.60/121,319.40 = 73,492.40/x
  3. Step 3: Cross multiply
    80,879.60x = 121,319.40 × 73,492.40
  4. Step 4: Simplify right side
    80,879.60x = 8,916,053,872.56
  5. Step 5: Solve for x
    x = 8,916,053,872.56/80,879.60
  6. Step 6: Final answer
    x = 110,238.60

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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.