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Finding the Fourth Proportional to 80,998.10, 121,497.15 and 28,388.60

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Solution

The fourth proportional to 80,998.10, 121,497.15 and 28,388.60 is: 42,582.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,998.10 : 121,497.15 = 28,388.60 : x
  2. Step 2: Convert to fraction form
    80,998.10/121,497.15 = 28,388.60/x
  3. Step 3: Cross multiply
    80,998.10x = 121,497.15 × 28,388.60
  4. Step 4: Simplify right side
    80,998.10x = 3,449,133,992.49
  5. Step 5: Solve for x
    x = 3,449,133,992.49/80,998.10
  6. Step 6: Final answer
    x = 42,582.90

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1.5x scale

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.