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Finding the Fourth Proportional to 143,144.40, 214,716.60 and 90,613.20

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Solution

The fourth proportional to 143,144.40, 214,716.60 and 90,613.20 is: 135,919.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,144.40 : 214,716.60 = 90,613.20 : x
  2. Step 2: Convert to fraction form
    143,144.40/214,716.60 = 90,613.20/x
  3. Step 3: Cross multiply
    143,144.40x = 214,716.60 × 90,613.20
  4. Step 4: Simplify right side
    143,144.40x = 19,456,158,219.12
  5. Step 5: Solve for x
    x = 19,456,158,219.12/143,144.40
  6. Step 6: Final answer
    x = 135,919.80

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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.