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Finding the Fourth Proportional to 161,438.62, 222,780.63 and 89,821.12

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Solution

The fourth proportional to 161,438.62, 222,780.63 and 89,821.12 is: 123,950.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,438.62 : 222,780.63 = 89,821.12 : x
  2. Step 2: Convert to fraction form
    161,438.62/222,780.63 = 89,821.12/x
  3. Step 3: Cross multiply
    161,438.62x = 222,780.63 × 89,821.12
  4. Step 4: Simplify right side
    161,438.62x = 20,010,405,700.91
  5. Step 5: Solve for x
    x = 20,010,405,700.91/161,438.62
  6. Step 6: Final answer
    x = 123,950.55

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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.