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Finding the Fourth Proportional to 79,789.76, 110,007.64 and 65,396.64

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Solution

The fourth proportional to 79,789.76, 110,007.64 and 65,396.64 is: 90,163.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,789.76 : 110,007.64 = 65,396.64 : x
  2. Step 2: Convert to fraction form
    79,789.76/110,007.64 = 65,396.64/x
  3. Step 3: Cross multiply
    79,789.76x = 110,007.64 × 65,396.64
  4. Step 4: Simplify right side
    79,789.76x = 7,194,130,030.33
  5. Step 5: Solve for x
    x = 7,194,130,030.33/79,789.76
  6. Step 6: Final answer
    x = 90,163.58

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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.