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Finding the Fourth Proportional to 80,661.40, 120,905.70 and 36,280.60

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Solution

The fourth proportional to 80,661.40, 120,905.70 and 36,280.60 is: 54,382.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,661.40 : 120,905.70 = 36,280.60 : x
  2. Step 2: Convert to fraction form
    80,661.40/120,905.70 = 36,280.60/x
  3. Step 3: Cross multiply
    80,661.40x = 120,905.70 × 36,280.60
  4. Step 4: Simplify right side
    80,661.40x = 4,386,531,339.42
  5. Step 5: Solve for x
    x = 4,386,531,339.42/80,661.40
  6. Step 6: Final answer
    x = 54,382.04

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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.