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Finding the Fourth Proportional to 79,480.74, 118,706.64 and 71,969.30

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Solution

The fourth proportional to 79,480.74, 118,706.64 and 71,969.30 is: 107,488.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,480.74 : 118,706.64 = 71,969.30 : x
  2. Step 2: Convert to fraction form
    79,480.74/118,706.64 = 71,969.30/x
  3. Step 3: Cross multiply
    79,480.74x = 118,706.64 × 71,969.30
  4. Step 4: Simplify right side
    79,480.74x = 8,543,233,786.15
  5. Step 5: Solve for x
    x = 8,543,233,786.15/79,480.74
  6. Step 6: Final answer
    x = 107,488.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.