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Finding the Fourth Proportional to 79,041.51, 109,055.31 and 47,198.79

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Solution

The fourth proportional to 79,041.51, 109,055.31 and 47,198.79 is: 65,121.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,041.51 : 109,055.31 = 47,198.79 : x
  2. Step 2: Convert to fraction form
    79,041.51/109,055.31 = 47,198.79/x
  3. Step 3: Cross multiply
    79,041.51x = 109,055.31 × 47,198.79
  4. Step 4: Simplify right side
    79,041.51x = 5,147,278,675.07
  5. Step 5: Solve for x
    x = 5,147,278,675.07/79,041.51
  6. Step 6: Final answer
    x = 65,121.21

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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.