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Finding the Fourth Proportional to 61,185.80, 91,778.70 and 61,185.80

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Solution

The fourth proportional to 61,185.80, 91,778.70 and 61,185.80 is: 91,778.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,185.80 : 91,778.70 = 61,185.80 : x
  2. Step 2: Convert to fraction form
    61,185.80/91,778.70 = 61,185.80/x
  3. Step 3: Cross multiply
    61,185.80x = 91,778.70 × 61,185.80
  4. Step 4: Simplify right side
    61,185.80x = 5,615,553,182.46
  5. Step 5: Solve for x
    x = 5,615,553,182.46/61,185.80
  6. Step 6: Final answer
    x = 91,778.70

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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.