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Finding the Fourth Proportional to 78,809.80, 118,214.70 and 26,224.60

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Solution

The fourth proportional to 78,809.80, 118,214.70 and 26,224.60 is: 39,336.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,809.80 : 118,214.70 = 26,224.60 : x
  2. Step 2: Convert to fraction form
    78,809.80/118,214.70 = 26,224.60/x
  3. Step 3: Cross multiply
    78,809.80x = 118,214.70 × 26,224.60
  4. Step 4: Simplify right side
    78,809.80x = 3,100,133,221.62
  5. Step 5: Solve for x
    x = 3,100,133,221.62/78,809.80
  6. Step 6: Final answer
    x = 39,336.90

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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.