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Finding the Fourth Proportional to 120,081.36, 180,151.59 and 84,611.96

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Solution

The fourth proportional to 120,081.36, 180,151.59 and 84,611.96 is: 126,938.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,081.36 : 180,151.59 = 84,611.96 : x
  2. Step 2: Convert to fraction form
    120,081.36/180,151.59 = 84,611.96/x
  3. Step 3: Cross multiply
    120,081.36x = 180,151.59 × 84,611.96
  4. Step 4: Simplify right side
    120,081.36x = 15,242,979,219.12
  5. Step 5: Solve for x
    x = 15,242,979,219.12/120,081.36
  6. Step 6: Final answer
    x = 126,938.76

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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.