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Finding the Fourth Proportional to 221,347.89, 305,715.06 and 161,187.57

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Solution

The fourth proportional to 221,347.89, 305,715.06 and 161,187.57 is: 222,624.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,347.89 : 305,715.06 = 161,187.57 : x
  2. Step 2: Convert to fraction form
    221,347.89/305,715.06 = 161,187.57/x
  3. Step 3: Cross multiply
    221,347.89x = 305,715.06 × 161,187.57
  4. Step 4: Simplify right side
    221,347.89x = 49,277,467,633.80
  5. Step 5: Solve for x
    x = 49,277,467,633.80/221,347.89
  6. Step 6: Final answer
    x = 222,624.52

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1.5x scale

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.