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Finding the Fourth Proportional to 61,245.46, 91,781.88 and 48,709.90

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Solution

The fourth proportional to 61,245.46, 91,781.88 and 48,709.90 is: 72,996.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,245.46 : 91,781.88 = 48,709.90 : x
  2. Step 2: Convert to fraction form
    61,245.46/91,781.88 = 48,709.90/x
  3. Step 3: Cross multiply
    61,245.46x = 91,781.88 × 48,709.90
  4. Step 4: Simplify right side
    61,245.46x = 4,470,686,196.61
  5. Step 5: Solve for x
    x = 4,470,686,196.61/61,245.46
  6. Step 6: Final answer
    x = 72,996.21

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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.