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Finding the Fourth Proportional to 69,988.69, 104,961.48 and 20,055.39

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Solution

The fourth proportional to 69,988.69, 104,961.48 and 20,055.39 is: 30,076.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,988.69 : 104,961.48 = 20,055.39 : x
  2. Step 2: Convert to fraction form
    69,988.69/104,961.48 = 20,055.39/x
  3. Step 3: Cross multiply
    69,988.69x = 104,961.48 × 20,055.39
  4. Step 4: Simplify right side
    69,988.69x = 2,105,043,416.38
  5. Step 5: Solve for x
    x = 2,105,043,416.38/69,988.69
  6. Step 6: Final answer
    x = 30,076.91

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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.