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Finding the Fourth Proportional to 219,721, 329,615.88 and 69,994.84

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Solution

The fourth proportional to 219,721, 329,615.88 and 69,994.84 is: 105,003.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,721 : 329,615.88 = 69,994.84 : x
  2. Step 2: Convert to fraction form
    219,721/329,615.88 = 69,994.84/x
  3. Step 3: Cross multiply
    219,721x = 329,615.88 × 69,994.84
  4. Step 4: Simplify right side
    219,721x = 23,071,410,782.06
  5. Step 5: Solve for x
    x = 23,071,410,782.06/219,721
  6. Step 6: Final answer
    x = 105,003.21

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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.