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Finding the Fourth Proportional to 161,999.87, 223,559.20 and 90,379.94

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Solution

The fourth proportional to 161,999.87, 223,559.20 and 90,379.94 is: 124,723.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,999.87 : 223,559.20 = 90,379.94 : x
  2. Step 2: Convert to fraction form
    161,999.87/223,559.20 = 90,379.94/x
  3. Step 3: Cross multiply
    161,999.87x = 223,559.20 × 90,379.94
  4. Step 4: Simplify right side
    161,999.87x = 20,205,267,082.45
  5. Step 5: Solve for x
    x = 20,205,267,082.45/161,999.87
  6. Step 6: Final answer
    x = 124,723.97

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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.