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Finding the Fourth Proportional to 107,920.45, 148,943.69 and 61,994.44

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Solution

The fourth proportional to 107,920.45, 148,943.69 and 61,994.44 is: 85,560.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,920.45 : 148,943.69 = 61,994.44 : x
  2. Step 2: Convert to fraction form
    107,920.45/148,943.69 = 61,994.44/x
  3. Step 3: Cross multiply
    107,920.45x = 148,943.69 × 61,994.44
  4. Step 4: Simplify right side
    107,920.45x = 9,233,680,653.08
  5. Step 5: Solve for x
    x = 9,233,680,653.08/107,920.45
  6. Step 6: Final answer
    x = 85,560.06

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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.