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Finding the Fourth Proportional to 143,508.62, 215,122.39 and 53,485.42

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Solution

The fourth proportional to 143,508.62, 215,122.39 and 53,485.42 is: 80,175.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,508.62 : 215,122.39 = 53,485.42 : x
  2. Step 2: Convert to fraction form
    143,508.62/215,122.39 = 53,485.42/x
  3. Step 3: Cross multiply
    143,508.62x = 215,122.39 × 53,485.42
  4. Step 4: Simplify right side
    143,508.62x = 11,505,911,380.55
  5. Step 5: Solve for x
    x = 11,505,911,380.55/143,508.62
  6. Step 6: Final answer
    x = 80,175.75

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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.