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Finding the Fourth Proportional to 214,072.40, 321,011.40 and 80,908.40

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Solution

The fourth proportional to 214,072.40, 321,011.40 and 80,908.40 is: 121,325.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,072.40 : 321,011.40 = 80,908.40 : x
  2. Step 2: Convert to fraction form
    214,072.40/321,011.40 = 80,908.40/x
  3. Step 3: Cross multiply
    214,072.40x = 321,011.40 × 80,908.40
  4. Step 4: Simplify right side
    214,072.40x = 25,972,518,755.76
  5. Step 5: Solve for x
    x = 25,972,518,755.76/214,072.40
  6. Step 6: Final answer
    x = 121,325.86

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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.