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Finding the Fourth Proportional to 220,563.60, 330,845.40 and 136,390.80

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Solution

The fourth proportional to 220,563.60, 330,845.40 and 136,390.80 is: 204,586.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,563.60 : 330,845.40 = 136,390.80 : x
  2. Step 2: Convert to fraction form
    220,563.60/330,845.40 = 136,390.80/x
  3. Step 3: Cross multiply
    220,563.60x = 330,845.40 × 136,390.80
  4. Step 4: Simplify right side
    220,563.60x = 45,124,268,782.32
  5. Step 5: Solve for x
    x = 45,124,268,782.32/220,563.60
  6. Step 6: Final answer
    x = 204,586.20

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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.