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Finding the Fourth Proportional to 220,481.48, 304,211.16 and 139,880

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Solution

The fourth proportional to 220,481.48, 304,211.16 and 139,880 is: 193,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,481.48 : 304,211.16 = 139,880 : x
  2. Step 2: Convert to fraction form
    220,481.48/304,211.16 = 139,880/x
  3. Step 3: Cross multiply
    220,481.48x = 304,211.16 × 139,880
  4. Step 4: Simplify right side
    220,481.48x = 42,553,057,060.80
  5. Step 5: Solve for x
    x = 42,553,057,060.80/220,481.48
  6. Step 6: Final answer
    x = 193,000.60

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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.