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Finding the Fourth Proportional to 81,287.94, 112,194.90 and 49,467.09

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Solution

The fourth proportional to 81,287.94, 112,194.90 and 49,467.09 is: 68,275.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,287.94 : 112,194.90 = 49,467.09 : x
  2. Step 2: Convert to fraction form
    81,287.94/112,194.90 = 49,467.09/x
  3. Step 3: Cross multiply
    81,287.94x = 112,194.90 × 49,467.09
  4. Step 4: Simplify right side
    81,287.94x = 5,549,955,215.84
  5. Step 5: Solve for x
    x = 5,549,955,215.84/81,287.94
  6. Step 6: Final answer
    x = 68,275.26

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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.