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Finding the Fourth Proportional to 80,657.56, 120,905.34 and 30,724.84

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Solution

The fourth proportional to 80,657.56, 120,905.34 and 30,724.84 is: 46,056.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,657.56 : 120,905.34 = 30,724.84 : x
  2. Step 2: Convert to fraction form
    80,657.56/120,905.34 = 30,724.84/x
  3. Step 3: Cross multiply
    80,657.56x = 120,905.34 × 30,724.84
  4. Step 4: Simplify right side
    80,657.56x = 3,714,797,226.65
  5. Step 5: Solve for x
    x = 3,714,797,226.65/80,657.56
  6. Step 6: Final answer
    x = 46,056.40

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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.