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Finding the Fourth Proportional to 220,445.20, 330,840.60 and 102,131.20

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Solution

The fourth proportional to 220,445.20, 330,840.60 and 102,131.20 is: 153,276.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,445.20 : 330,840.60 = 102,131.20 : x
  2. Step 2: Convert to fraction form
    220,445.20/330,840.60 = 102,131.20/x
  3. Step 3: Cross multiply
    220,445.20x = 330,840.60 × 102,131.20
  4. Step 4: Simplify right side
    220,445.20x = 33,789,147,486.72
  5. Step 5: Solve for x
    x = 33,789,147,486.72/220,445.20
  6. Step 6: Final answer
    x = 153,276.86

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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.