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Finding the Fourth Proportional to 81,979.52, 122,980 and 29,394.88

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Solution

The fourth proportional to 81,979.52, 122,980 and 29,394.88 is: 44,096.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,979.52 : 122,980 = 29,394.88 : x
  2. Step 2: Convert to fraction form
    81,979.52/122,980 = 29,394.88/x
  3. Step 3: Cross multiply
    81,979.52x = 122,980 × 29,394.88
  4. Step 4: Simplify right side
    81,979.52x = 3,614,982,342.40
  5. Step 5: Solve for x
    x = 3,614,982,342.40/81,979.52
  6. Step 6: Final answer
    x = 44,096.16

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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.