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Finding the Fourth Proportional to 79,721.63, 110,007.86 and 49,089.81

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Solution

The fourth proportional to 79,721.63, 110,007.86 and 49,089.81 is: 67,739.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,721.63 : 110,007.86 = 49,089.81 : x
  2. Step 2: Convert to fraction form
    79,721.63/110,007.86 = 49,089.81/x
  3. Step 3: Cross multiply
    79,721.63x = 110,007.86 × 49,089.81
  4. Step 4: Simplify right side
    79,721.63x = 5,400,264,884.54
  5. Step 5: Solve for x
    x = 5,400,264,884.54/79,721.63
  6. Step 6: Final answer
    x = 67,739.02

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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.