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Finding the Fourth Proportional to 104,557.84, 156,939.73 and 74,605.05

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Solution

The fourth proportional to 104,557.84, 156,939.73 and 74,605.05 is: 111,981.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,557.84 : 156,939.73 = 74,605.05 : x
  2. Step 2: Convert to fraction form
    104,557.84/156,939.73 = 74,605.05/x
  3. Step 3: Cross multiply
    104,557.84x = 156,939.73 × 74,605.05
  4. Step 4: Simplify right side
    104,557.84x = 11,708,496,217.12
  5. Step 5: Solve for x
    x = 11,708,496,217.12/104,557.84
  6. Step 6: Final answer
    x = 111,981.05

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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.