Home / 83,481.15-115,221.39-76,756.12

Finding the Fourth Proportional to 83,481.15, 115,221.39 and 76,756.12

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Solution

The fourth proportional to 83,481.15, 115,221.39 and 76,756.12 is: 105,939.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,481.15 : 115,221.39 = 76,756.12 : x
  2. Step 2: Convert to fraction form
    83,481.15/115,221.39 = 76,756.12/x
  3. Step 3: Cross multiply
    83,481.15x = 115,221.39 × 76,756.12
  4. Step 4: Simplify right side
    83,481.15x = 8,843,946,837.41
  5. Step 5: Solve for x
    x = 8,843,946,837.41/83,481.15
  6. Step 6: Final answer
    x = 105,939.45

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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.