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Finding the Fourth Proportional to 161,900.70, 223,396.11 and 90,278.70

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Solution

The fourth proportional to 161,900.70, 223,396.11 and 90,278.70 is: 124,569.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,900.70 : 223,396.11 = 90,278.70 : x
  2. Step 2: Convert to fraction form
    161,900.70/223,396.11 = 90,278.70/x
  3. Step 3: Cross multiply
    161,900.70x = 223,396.11 × 90,278.70
  4. Step 4: Simplify right side
    161,900.70x = 20,167,910,395.86
  5. Step 5: Solve for x
    x = 20,167,910,395.86/161,900.70
  6. Step 6: Final answer
    x = 124,569.63

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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.