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Finding the Fourth Proportional to 80,410.88, 120,636.48 and 70,321.52

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Solution

The fourth proportional to 80,410.88, 120,636.48 and 70,321.52 is: 105,499.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,410.88 : 120,636.48 = 70,321.52 : x
  2. Step 2: Convert to fraction form
    80,410.88/120,636.48 = 70,321.52/x
  3. Step 3: Cross multiply
    80,410.88x = 120,636.48 × 70,321.52
  4. Step 4: Simplify right side
    80,410.88x = 8,483,340,641.05
  5. Step 5: Solve for x
    x = 8,483,340,641.05/80,410.88
  6. Step 6: Final answer
    x = 105,499.91

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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.