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Finding the Fourth Proportional to 80,326.72, 110,863.92 and 76,783.24

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Solution

The fourth proportional to 80,326.72, 110,863.92 and 76,783.24 is: 105,973.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,326.72 : 110,863.92 = 76,783.24 : x
  2. Step 2: Convert to fraction form
    80,326.72/110,863.92 = 76,783.24/x
  3. Step 3: Cross multiply
    80,326.72x = 110,863.92 × 76,783.24
  4. Step 4: Simplify right side
    80,326.72x = 8,512,490,976.70
  5. Step 5: Solve for x
    x = 8,512,490,976.70/80,326.72
  6. Step 6: Final answer
    x = 105,973.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.