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Finding the Fourth Proportional to 79,641.38, 109,902.48 and 47,791.46

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Solution

The fourth proportional to 79,641.38, 109,902.48 and 47,791.46 is: 65,950.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,641.38 : 109,902.48 = 47,791.46 : x
  2. Step 2: Convert to fraction form
    79,641.38/109,902.48 = 47,791.46/x
  3. Step 3: Cross multiply
    79,641.38x = 109,902.48 × 47,791.46
  4. Step 4: Simplify right side
    79,641.38x = 5,252,399,976.82
  5. Step 5: Solve for x
    x = 5,252,399,976.82/79,641.38
  6. Step 6: Final answer
    x = 65,950.64

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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.