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Finding the Fourth Proportional to 212,679.92, 319,061.84 and 60,878.44

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Solution

The fourth proportional to 212,679.92, 319,061.84 and 60,878.44 is: 91,329.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,679.92 : 319,061.84 = 60,878.44 : x
  2. Step 2: Convert to fraction form
    212,679.92/319,061.84 = 60,878.44/x
  3. Step 3: Cross multiply
    212,679.92x = 319,061.84 × 60,878.44
  4. Step 4: Simplify right side
    212,679.92x = 19,423,987,082.73
  5. Step 5: Solve for x
    x = 19,423,987,082.73/212,679.92
  6. Step 6: Final answer
    x = 91,329.67

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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.