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Finding the Fourth Proportional to 219,443.61, 329,131.80 and 69,664.35

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Solution

The fourth proportional to 219,443.61, 329,131.80 and 69,664.35 is: 104,485.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,443.61 : 329,131.80 = 69,664.35 : x
  2. Step 2: Convert to fraction form
    219,443.61/329,131.80 = 69,664.35/x
  3. Step 3: Cross multiply
    219,443.61x = 329,131.80 × 69,664.35
  4. Step 4: Simplify right side
    219,443.61x = 22,928,752,911.33
  5. Step 5: Solve for x
    x = 22,928,752,911.33/219,443.61
  6. Step 6: Final answer
    x = 104,485.85

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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.