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Finding the Fourth Proportional to 79,121.00, 118,802.09 and 69,120.34

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Solution

The fourth proportional to 79,121.00, 118,802.09 and 69,120.34 is: 103,785.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,121.00 : 118,802.09 = 69,120.34 : x
  2. Step 2: Convert to fraction form
    79,121.00/118,802.09 = 69,120.34/x
  3. Step 3: Cross multiply
    79,121.00x = 118,802.09 × 69,120.34
  4. Step 4: Simplify right side
    79,121.00x = 8,211,640,729.31
  5. Step 5: Solve for x
    x = 8,211,640,729.31/79,121.00
  6. Step 6: Final answer
    x = 103,785.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.