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Finding the Fourth Proportional to 60,876.86, 91,306.78 and 20,895.22

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Solution

The fourth proportional to 60,876.86, 91,306.78 and 20,895.22 is: 31,339.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,876.86 : 91,306.78 = 20,895.22 : x
  2. Step 2: Convert to fraction form
    60,876.86/91,306.78 = 20,895.22/x
  3. Step 3: Cross multiply
    60,876.86x = 91,306.78 × 20,895.22
  4. Step 4: Simplify right side
    60,876.86x = 1,907,875,255.59
  5. Step 5: Solve for x
    x = 1,907,875,255.59/60,876.86
  6. Step 6: Final answer
    x = 31,339.91

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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.