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Finding the Fourth Proportional to 80,219.54, 120,439.74 and 40,803.32

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Solution

The fourth proportional to 80,219.54, 120,439.74 and 40,803.32 is: 61,261.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,219.54 : 120,439.74 = 40,803.32 : x
  2. Step 2: Convert to fraction form
    80,219.54/120,439.74 = 40,803.32/x
  3. Step 3: Cross multiply
    80,219.54x = 120,439.74 × 40,803.32
  4. Step 4: Simplify right side
    80,219.54x = 4,914,341,251.94
  5. Step 5: Solve for x
    x = 4,914,341,251.94/80,219.54
  6. Step 6: Final answer
    x = 61,261.15

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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.