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Finding the Fourth Proportional to 220,893.60, 331,340.40 and 136,912.80

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Solution

The fourth proportional to 220,893.60, 331,340.40 and 136,912.80 is: 205,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,893.60 : 331,340.40 = 136,912.80 : x
  2. Step 2: Convert to fraction form
    220,893.60/331,340.40 = 136,912.80/x
  3. Step 3: Cross multiply
    220,893.60x = 331,340.40 × 136,912.80
  4. Step 4: Simplify right side
    220,893.60x = 45,364,741,917.12
  5. Step 5: Solve for x
    x = 45,364,741,917.12/220,893.60
  6. Step 6: Final answer
    x = 205,369.20

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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.