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Finding the Fourth Proportional to 99,954, 149,358.06 and 76,129.20

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Solution

The fourth proportional to 99,954, 149,358.06 and 76,129.20 is: 113,757.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,954 : 149,358.06 = 76,129.20 : x
  2. Step 2: Convert to fraction form
    99,954/149,358.06 = 76,129.20/x
  3. Step 3: Cross multiply
    99,954x = 149,358.06 × 76,129.20
  4. Step 4: Simplify right side
    99,954x = 11,370,509,621.35
  5. Step 5: Solve for x
    x = 11,370,509,621.35/99,954
  6. Step 6: Final answer
    x = 113,757.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.