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Finding the Fourth Proportional to 80,181.51, 120,236.70 and 42,734.59

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Solution

The fourth proportional to 80,181.51, 120,236.70 and 42,734.59 is: 64,082.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,181.51 : 120,236.70 = 42,734.59 : x
  2. Step 2: Convert to fraction form
    80,181.51/120,236.70 = 42,734.59/x
  3. Step 3: Cross multiply
    80,181.51x = 120,236.70 × 42,734.59
  4. Step 4: Simplify right side
    80,181.51x = 5,138,266,077.45
  5. Step 5: Solve for x
    x = 5,138,266,077.45/80,181.51
  6. Step 6: Final answer
    x = 64,082.93

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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.