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Finding the Fourth Proportional to 220,899.62, 304,745.20 and 139,178.26

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Solution

The fourth proportional to 220,899.62, 304,745.20 and 139,178.26 is: 192,005.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,899.62 : 304,745.20 = 139,178.26 : x
  2. Step 2: Convert to fraction form
    220,899.62/304,745.20 = 139,178.26/x
  3. Step 3: Cross multiply
    220,899.62x = 304,745.20 × 139,178.26
  4. Step 4: Simplify right side
    220,899.62x = 42,413,906,679.35
  5. Step 5: Solve for x
    x = 42,413,906,679.35/220,899.62
  6. Step 6: Final answer
    x = 192,005.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.