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Finding the Fourth Proportional to 143,998.60, 215,997.90 and 140,110.60

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Solution

The fourth proportional to 143,998.60, 215,997.90 and 140,110.60 is: 210,165.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,998.60 : 215,997.90 = 140,110.60 : x
  2. Step 2: Convert to fraction form
    143,998.60/215,997.90 = 140,110.60/x
  3. Step 3: Cross multiply
    143,998.60x = 215,997.90 × 140,110.60
  4. Step 4: Simplify right side
    143,998.60x = 30,263,595,367.74
  5. Step 5: Solve for x
    x = 30,263,595,367.74/143,998.60
  6. Step 6: Final answer
    x = 210,165.90

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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.