Home / 81,719.39-112,512.07-69,734.63

Finding the Fourth Proportional to 81,719.39, 112,512.07 and 69,734.63

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Solution

The fourth proportional to 81,719.39, 112,512.07 and 69,734.63 is: 96,011.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,719.39 : 112,512.07 = 69,734.63 : x
  2. Step 2: Convert to fraction form
    81,719.39/112,512.07 = 69,734.63/x
  3. Step 3: Cross multiply
    81,719.39x = 112,512.07 × 69,734.63
  4. Step 4: Simplify right side
    81,719.39x = 7,845,987,940.43
  5. Step 5: Solve for x
    x = 7,845,987,940.43/81,719.39
  6. Step 6: Final answer
    x = 96,011.33

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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.