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Finding the Fourth Proportional to 214,980.30, 322,470.45 and 81,816.30

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Solution

The fourth proportional to 214,980.30, 322,470.45 and 81,816.30 is: 122,724.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,980.30 : 322,470.45 = 81,816.30 : x
  2. Step 2: Convert to fraction form
    214,980.30/322,470.45 = 81,816.30/x
  3. Step 3: Cross multiply
    214,980.30x = 322,470.45 × 81,816.30
  4. Step 4: Simplify right side
    214,980.30x = 26,383,339,078.34
  5. Step 5: Solve for x
    x = 26,383,339,078.34/214,980.30
  6. Step 6: Final answer
    x = 122,724.45

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1.5x scale

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.