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Finding the Fourth Proportional to 78,998.80, 118,503.96 and 22,839.20

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Solution

The fourth proportional to 78,998.80, 118,503.96 and 22,839.20 is: 34,260.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,998.80 : 118,503.96 = 22,839.20 : x
  2. Step 2: Convert to fraction form
    78,998.80/118,503.96 = 22,839.20/x
  3. Step 3: Cross multiply
    78,998.80x = 118,503.96 × 22,839.20
  4. Step 4: Simplify right side
    78,998.80x = 2,706,535,662.91
  5. Step 5: Solve for x
    x = 2,706,535,662.91/78,998.80
  6. Step 6: Final answer
    x = 34,260.47

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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.