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Finding the Fourth Proportional to 80,608.60, 120,912.90 and 55,725.40

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Solution

The fourth proportional to 80,608.60, 120,912.90 and 55,725.40 is: 83,588.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,608.60 : 120,912.90 = 55,725.40 : x
  2. Step 2: Convert to fraction form
    80,608.60/120,912.90 = 55,725.40/x
  3. Step 3: Cross multiply
    80,608.60x = 120,912.90 × 55,725.40
  4. Step 4: Simplify right side
    80,608.60x = 6,737,919,717.66
  5. Step 5: Solve for x
    x = 6,737,919,717.66/80,608.60
  6. Step 6: Final answer
    x = 83,588.10

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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.