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Finding the Fourth Proportional to 111,847.80, 154,349.95 and 61,546.80

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Solution

The fourth proportional to 111,847.80, 154,349.95 and 61,546.80 is: 84,934.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,847.80 : 154,349.95 = 61,546.80 : x
  2. Step 2: Convert to fraction form
    111,847.80/154,349.95 = 61,546.80/x
  3. Step 3: Cross multiply
    111,847.80x = 154,349.95 × 61,546.80
  4. Step 4: Simplify right side
    111,847.80x = 9,499,745,502.66
  5. Step 5: Solve for x
    x = 9,499,745,502.66/111,847.80
  6. Step 6: Final answer
    x = 84,934.58

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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.