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Finding the Fourth Proportional to 81,469.91, 112,426.75 and 45,659.15

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Solution

The fourth proportional to 81,469.91, 112,426.75 and 45,659.15 is: 63,008.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,469.91 : 112,426.75 = 45,659.15 : x
  2. Step 2: Convert to fraction form
    81,469.91/112,426.75 = 45,659.15/x
  3. Step 3: Cross multiply
    81,469.91x = 112,426.75 × 45,659.15
  4. Step 4: Simplify right side
    81,469.91x = 5,133,309,842.26
  5. Step 5: Solve for x
    x = 5,133,309,842.26/81,469.91
  6. Step 6: Final answer
    x = 63,008.66

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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.