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Finding the Fourth Proportional to 231,026.62, 318,782.82 and 129,039.52

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Solution

The fourth proportional to 231,026.62, 318,782.82 and 129,039.52 is: 178,055.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,026.62 : 318,782.82 = 129,039.52 : x
  2. Step 2: Convert to fraction form
    231,026.62/318,782.82 = 129,039.52/x
  3. Step 3: Cross multiply
    231,026.62x = 318,782.82 × 129,039.52
  4. Step 4: Simplify right side
    231,026.62x = 41,135,582,077.05
  5. Step 5: Solve for x
    x = 41,135,582,077.05/231,026.62
  6. Step 6: Final answer
    x = 178,055.59

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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.