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Finding the Fourth Proportional to 220,489.20, 330,636.60 and 87,325.20

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Solution

The fourth proportional to 220,489.20, 330,636.60 and 87,325.20 is: 130,949.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,489.20 : 330,636.60 = 87,325.20 : x
  2. Step 2: Convert to fraction form
    220,489.20/330,636.60 = 87,325.20/x
  3. Step 3: Cross multiply
    220,489.20x = 330,636.60 × 87,325.20
  4. Step 4: Simplify right side
    220,489.20x = 28,872,907,222.32
  5. Step 5: Solve for x
    x = 28,872,907,222.32/220,489.20
  6. Step 6: Final answer
    x = 130,949.30

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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.