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Finding the Fourth Proportional to 73,108.64, 100,890.08 and 39,574.64

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Solution

The fourth proportional to 73,108.64, 100,890.08 and 39,574.64 is: 54,613.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,108.64 : 100,890.08 = 39,574.64 : x
  2. Step 2: Convert to fraction form
    73,108.64/100,890.08 = 39,574.64/x
  3. Step 3: Cross multiply
    73,108.64x = 100,890.08 × 39,574.64
  4. Step 4: Simplify right side
    73,108.64x = 3,992,687,893.25
  5. Step 5: Solve for x
    x = 3,992,687,893.25/73,108.64
  6. Step 6: Final answer
    x = 54,613.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.