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Finding the Fourth Proportional to 220,609.20, 330,816.60 and 87,445.20

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Solution

The fourth proportional to 220,609.20, 330,816.60 and 87,445.20 is: 131,129.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,609.20 : 330,816.60 = 87,445.20 : x
  2. Step 2: Convert to fraction form
    220,609.20/330,816.60 = 87,445.20/x
  3. Step 3: Cross multiply
    220,609.20x = 330,816.60 × 87,445.20
  4. Step 4: Simplify right side
    220,609.20x = 28,928,323,750.32
  5. Step 5: Solve for x
    x = 28,928,323,750.32/220,609.20
  6. Step 6: Final answer
    x = 131,129.27

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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.