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Finding the Fourth Proportional to 120,991.10, 181,523.10 and 85,999.10

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Solution

The fourth proportional to 120,991.10, 181,523.10 and 85,999.10 is: 129,024.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,991.10 : 181,523.10 = 85,999.10 : x
  2. Step 2: Convert to fraction form
    120,991.10/181,523.10 = 85,999.10/x
  3. Step 3: Cross multiply
    120,991.10x = 181,523.10 × 85,999.10
  4. Step 4: Simplify right side
    120,991.10x = 15,610,823,229.21
  5. Step 5: Solve for x
    x = 15,610,823,229.21/120,991.10
  6. Step 6: Final answer
    x = 129,024.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.