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Finding the Fourth Proportional to 60,874.74, 91,217.90 and 42,191.28

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Solution

The fourth proportional to 60,874.74, 91,217.90 and 42,191.28 is: 63,221.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,874.74 : 91,217.90 = 42,191.28 : x
  2. Step 2: Convert to fraction form
    60,874.74/91,217.90 = 42,191.28/x
  3. Step 3: Cross multiply
    60,874.74x = 91,217.90 × 42,191.28
  4. Step 4: Simplify right side
    60,874.74x = 3,848,599,828.06
  5. Step 5: Solve for x
    x = 3,848,599,828.06/60,874.74
  6. Step 6: Final answer
    x = 63,221.62

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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.