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Finding the Fourth Proportional to 161,861.30, 223,369.53 and 90,245.78

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Solution

The fourth proportional to 161,861.30, 223,369.53 and 90,245.78 is: 124,539.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,861.30 : 223,369.53 = 90,245.78 : x
  2. Step 2: Convert to fraction form
    161,861.30/223,369.53 = 90,245.78/x
  3. Step 3: Cross multiply
    161,861.30x = 223,369.53 × 90,245.78
  4. Step 4: Simplify right side
    161,861.30x = 20,158,157,463.08
  5. Step 5: Solve for x
    x = 20,158,157,463.08/161,861.30
  6. Step 6: Final answer
    x = 124,539.70

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.