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Finding the Fourth Proportional to 225,986.40, 338,979.60 and 85,737.60

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Solution

The fourth proportional to 225,986.40, 338,979.60 and 85,737.60 is: 128,606.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,986.40 : 338,979.60 = 85,737.60 : x
  2. Step 2: Convert to fraction form
    225,986.40/338,979.60 = 85,737.60/x
  3. Step 3: Cross multiply
    225,986.40x = 338,979.60 × 85,737.60
  4. Step 4: Simplify right side
    225,986.40x = 29,063,297,352.96
  5. Step 5: Solve for x
    x = 29,063,297,352.96/225,986.40
  6. Step 6: Final answer
    x = 128,606.40

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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.