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Finding the Fourth Proportional to 61,149.88, 91,587.86 and 53,149.88

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Solution

The fourth proportional to 61,149.88, 91,587.86 and 53,149.88 is: 79,605.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,149.88 : 91,587.86 = 53,149.88 : x
  2. Step 2: Convert to fraction form
    61,149.88/91,587.86 = 53,149.88/x
  3. Step 3: Cross multiply
    61,149.88x = 91,587.86 × 53,149.88
  4. Step 4: Simplify right side
    61,149.88x = 4,867,883,768.46
  5. Step 5: Solve for x
    x = 4,867,883,768.46/61,149.88
  6. Step 6: Final answer
    x = 79,605.78

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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.