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Finding the Fourth Proportional to 85,007.70, 127,511.55 and 80,169.30

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Solution

The fourth proportional to 85,007.70, 127,511.55 and 80,169.30 is: 120,253.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,007.70 : 127,511.55 = 80,169.30 : x
  2. Step 2: Convert to fraction form
    85,007.70/127,511.55 = 80,169.30/x
  3. Step 3: Cross multiply
    85,007.70x = 127,511.55 × 80,169.30
  4. Step 4: Simplify right side
    85,007.70x = 10,222,511,705.42
  5. Step 5: Solve for x
    x = 10,222,511,705.42/85,007.70
  6. Step 6: Final answer
    x = 120,253.95

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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.