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Finding the Fourth Proportional to 143,321.60, 214,982.40 and 72,462.80

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Solution

The fourth proportional to 143,321.60, 214,982.40 and 72,462.80 is: 108,694.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,321.60 : 214,982.40 = 72,462.80 : x
  2. Step 2: Convert to fraction form
    143,321.60/214,982.40 = 72,462.80/x
  3. Step 3: Cross multiply
    143,321.60x = 214,982.40 × 72,462.80
  4. Step 4: Simplify right side
    143,321.60x = 15,578,226,654.72
  5. Step 5: Solve for x
    x = 15,578,226,654.72/143,321.60
  6. Step 6: Final answer
    x = 108,694.20

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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.