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Finding the Fourth Proportional to 81,611.82, 112,696.38 and 51,447.69

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Solution

The fourth proportional to 81,611.82, 112,696.38 and 51,447.69 is: 71,043.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,611.82 : 112,696.38 = 51,447.69 : x
  2. Step 2: Convert to fraction form
    81,611.82/112,696.38 = 51,447.69/x
  3. Step 3: Cross multiply
    81,611.82x = 112,696.38 × 51,447.69
  4. Step 4: Simplify right side
    81,611.82x = 5,797,968,422.36
  5. Step 5: Solve for x
    x = 5,797,968,422.36/81,611.82
  6. Step 6: Final answer
    x = 71,043.24

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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.