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Finding the Fourth Proportional to 214,165.68, 321,253.68 and 72,012.80

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Solution

The fourth proportional to 214,165.68, 321,253.68 and 72,012.80 is: 108,020.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,165.68 : 321,253.68 = 72,012.80 : x
  2. Step 2: Convert to fraction form
    214,165.68/321,253.68 = 72,012.80/x
  3. Step 3: Cross multiply
    214,165.68x = 321,253.68 × 72,012.80
  4. Step 4: Simplify right side
    214,165.68x = 23,134,377,007.10
  5. Step 5: Solve for x
    x = 23,134,377,007.10/214,165.68
  6. Step 6: Final answer
    x = 108,020.94

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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.