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Finding the Fourth Proportional to 81,801.36, 112,889.04 and 49,984.56

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Solution

The fourth proportional to 81,801.36, 112,889.04 and 49,984.56 is: 68,980.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,801.36 : 112,889.04 = 49,984.56 : x
  2. Step 2: Convert to fraction form
    81,801.36/112,889.04 = 49,984.56/x
  3. Step 3: Cross multiply
    81,801.36x = 112,889.04 × 49,984.56
  4. Step 4: Simplify right side
    81,801.36x = 5,642,708,993.22
  5. Step 5: Solve for x
    x = 5,642,708,993.22/81,801.36
  6. Step 6: Final answer
    x = 68,980.63

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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.