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Finding the Fourth Proportional to 218,645.60, 327,903.60 and 85,449.20

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Solution

The fourth proportional to 218,645.60, 327,903.60 and 85,449.20 is: 128,148.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,645.60 : 327,903.60 = 85,449.20 : x
  2. Step 2: Convert to fraction form
    218,645.60/327,903.60 = 85,449.20/x
  3. Step 3: Cross multiply
    218,645.60x = 327,903.60 × 85,449.20
  4. Step 4: Simplify right side
    218,645.60x = 28,019,100,297.12
  5. Step 5: Solve for x
    x = 28,019,100,297.12/218,645.60
  6. Step 6: Final answer
    x = 128,148.48

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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.