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Finding the Fourth Proportional to 143,279.46, 214,923.60 and 68,407.56

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Solution

The fourth proportional to 143,279.46, 214,923.60 and 68,407.56 is: 102,613.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,279.46 : 214,923.60 = 68,407.56 : x
  2. Step 2: Convert to fraction form
    143,279.46/214,923.60 = 68,407.56/x
  3. Step 3: Cross multiply
    143,279.46x = 214,923.60 × 68,407.56
  4. Step 4: Simplify right side
    143,279.46x = 14,702,399,062.42
  5. Step 5: Solve for x
    x = 14,702,399,062.42/143,279.46
  6. Step 6: Final answer
    x = 102,613.45

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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.