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Finding the Fourth Proportional to 215,785.60, 323,775.60 and 103,422.40

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Solution

The fourth proportional to 215,785.60, 323,775.60 and 103,422.40 is: 155,180.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,785.60 : 323,775.60 = 103,422.40 : x
  2. Step 2: Convert to fraction form
    215,785.60/323,775.60 = 103,422.40/x
  3. Step 3: Cross multiply
    215,785.60x = 323,775.60 × 103,422.40
  4. Step 4: Simplify right side
    215,785.60x = 33,485,649,613.44
  5. Step 5: Solve for x
    x = 33,485,649,613.44/215,785.60
  6. Step 6: Final answer
    x = 155,180.19

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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.