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Finding the Fourth Proportional to 79,603.80, 109,880.21 and 49,406.79

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Solution

The fourth proportional to 79,603.80, 109,880.21 and 49,406.79 is: 68,198.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,603.80 : 109,880.21 = 49,406.79 : x
  2. Step 2: Convert to fraction form
    79,603.80/109,880.21 = 49,406.79/x
  3. Step 3: Cross multiply
    79,603.80x = 109,880.21 × 49,406.79
  4. Step 4: Simplify right side
    79,603.80x = 5,428,828,996.19
  5. Step 5: Solve for x
    x = 5,428,828,996.19/79,603.80
  6. Step 6: Final answer
    x = 68,198.12

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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.