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Finding the Fourth Proportional to 79,807.97, 109,336.46 and 76,816.64

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Solution

The fourth proportional to 79,807.97, 109,336.46 and 76,816.64 is: 105,238.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,807.97 : 109,336.46 = 76,816.64 : x
  2. Step 2: Convert to fraction form
    79,807.97/109,336.46 = 76,816.64/x
  3. Step 3: Cross multiply
    79,807.97x = 109,336.46 × 76,816.64
  4. Step 4: Simplify right side
    79,807.97x = 8,398,859,132.05
  5. Step 5: Solve for x
    x = 8,398,859,132.05/79,807.97
  6. Step 6: Final answer
    x = 105,238.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.