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Finding the Fourth Proportional to 214,948.80, 322,423.20 and 83,620.80

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Solution

The fourth proportional to 214,948.80, 322,423.20 and 83,620.80 is: 125,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,948.80 : 322,423.20 = 83,620.80 : x
  2. Step 2: Convert to fraction form
    214,948.80/322,423.20 = 83,620.80/x
  3. Step 3: Cross multiply
    214,948.80x = 322,423.20 × 83,620.80
  4. Step 4: Simplify right side
    214,948.80x = 26,961,285,922.56
  5. Step 5: Solve for x
    x = 26,961,285,922.56/214,948.80
  6. Step 6: Final answer
    x = 125,431.20

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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.