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Finding the Fourth Proportional to 69,805.38, 104,706.72 and 19,885.80

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Solution

The fourth proportional to 69,805.38, 104,706.72 and 19,885.80 is: 29,828.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,805.38 : 104,706.72 = 19,885.80 : x
  2. Step 2: Convert to fraction form
    69,805.38/104,706.72 = 19,885.80/x
  3. Step 3: Cross multiply
    69,805.38x = 104,706.72 × 19,885.80
  4. Step 4: Simplify right side
    69,805.38x = 2,082,176,892.58
  5. Step 5: Solve for x
    x = 2,082,176,892.58/69,805.38
  6. Step 6: Final answer
    x = 29,828.32

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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.