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Finding the Fourth Proportional to 69,995, 104,992.50 and 20,747

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Solution

The fourth proportional to 69,995, 104,992.50 and 20,747 is: 31,120.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,995 : 104,992.50 = 20,747 : x
  2. Step 2: Convert to fraction form
    69,995/104,992.50 = 20,747/x
  3. Step 3: Cross multiply
    69,995x = 104,992.50 × 20,747
  4. Step 4: Simplify right side
    69,995x = 2,178,279,397.50
  5. Step 5: Solve for x
    x = 2,178,279,397.50/69,995
  6. Step 6: Final answer
    x = 31,120.50

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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.