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Finding the Fourth Proportional to 121,356.07, 167,472.16 and 67,644.50

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Solution

The fourth proportional to 121,356.07, 167,472.16 and 67,644.50 is: 93,349.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,356.07 : 167,472.16 = 67,644.50 : x
  2. Step 2: Convert to fraction form
    121,356.07/167,472.16 = 67,644.50/x
  3. Step 3: Cross multiply
    121,356.07x = 167,472.16 × 67,644.50
  4. Step 4: Simplify right side
    121,356.07x = 11,328,569,520.65
  5. Step 5: Solve for x
    x = 11,328,569,520.65/121,356.07
  6. Step 6: Final answer
    x = 93,349.84

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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.