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Finding the Fourth Proportional to 61,187,908.60, 91,786,010.10 and 20,801,438.20

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Solution

The fourth proportional to 61,187,908.60, 91,786,010.10 and 20,801,438.20 is: 31,203,567.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,187,908.60 : 91,786,010.10 = 20,801,438.20 : x
  2. Step 2: Convert to fraction form
    61,187,908.60/91,786,010.10 = 20,801,438.20/x
  3. Step 3: Cross multiply
    61,187,908.60x = 91,786,010.10 × 20,801,438.20
  4. Step 4: Simplify right side
    61,187,908.60x = 1,909,281,016,719,725.75
  5. Step 5: Solve for x
    x = 1,909,281,016,719,725.75/61,187,908.60
  6. Step 6: Final answer
    x = 31,203,567.18

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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.