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Finding the Fourth Proportional to 84,707.47, 126,811.55 and 74,198.03

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Solution

The fourth proportional to 84,707.47, 126,811.55 and 74,198.03 is: 111,078.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,707.47 : 126,811.55 = 74,198.03 : x
  2. Step 2: Convert to fraction form
    84,707.47/126,811.55 = 74,198.03/x
  3. Step 3: Cross multiply
    84,707.47x = 126,811.55 × 74,198.03
  4. Step 4: Simplify right side
    84,707.47x = 9,409,166,742.68
  5. Step 5: Solve for x
    x = 9,409,166,742.68/84,707.47
  6. Step 6: Final answer
    x = 111,078.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.