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Finding the Fourth Proportional to 78,769.53, 118,153.69 and 19,604.80

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Solution

The fourth proportional to 78,769.53, 118,153.69 and 19,604.80 is: 29,407.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,769.53 : 118,153.69 = 19,604.80 : x
  2. Step 2: Convert to fraction form
    78,769.53/118,153.69 = 19,604.80/x
  3. Step 3: Cross multiply
    78,769.53x = 118,153.69 × 19,604.80
  4. Step 4: Simplify right side
    78,769.53x = 2,316,379,560.39
  5. Step 5: Solve for x
    x = 2,316,379,560.39/78,769.53
  6. Step 6: Final answer
    x = 29,407.05

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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.