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Finding the Fourth Proportional to 161,396.40, 222,709.80 and 89,764.92

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Solution

The fourth proportional to 161,396.40, 222,709.80 and 89,764.92 is: 123,866.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,396.40 : 222,709.80 = 89,764.92 : x
  2. Step 2: Convert to fraction form
    161,396.40/222,709.80 = 89,764.92/x
  3. Step 3: Cross multiply
    161,396.40x = 222,709.80 × 89,764.92
  4. Step 4: Simplify right side
    161,396.40x = 19,991,527,380.22
  5. Step 5: Solve for x
    x = 19,991,527,380.22/161,396.40
  6. Step 6: Final answer
    x = 123,866.01

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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.