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Finding the Fourth Proportional to 78,179.33, 117,269.09 and 19,014.59

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Solution

The fourth proportional to 78,179.33, 117,269.09 and 19,014.59 is: 28,521.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,179.33 : 117,269.09 = 19,014.59 : x
  2. Step 2: Convert to fraction form
    78,179.33/117,269.09 = 19,014.59/x
  3. Step 3: Cross multiply
    78,179.33x = 117,269.09 × 19,014.59
  4. Step 4: Simplify right side
    78,179.33x = 2,229,822,984.60
  5. Step 5: Solve for x
    x = 2,229,822,984.60/78,179.33
  6. Step 6: Final answer
    x = 28,521.90

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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.