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Finding the Fourth Proportional to 206,283.36, 309,029.76 and 139,608.48

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Solution

The fourth proportional to 206,283.36, 309,029.76 and 139,608.48 is: 209,145.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,283.36 : 309,029.76 = 139,608.48 : x
  2. Step 2: Convert to fraction form
    206,283.36/309,029.76 = 139,608.48/x
  3. Step 3: Cross multiply
    206,283.36x = 309,029.76 × 139,608.48
  4. Step 4: Simplify right side
    206,283.36x = 43,143,175,068.36
  5. Step 5: Solve for x
    x = 43,143,175,068.36/206,283.36
  6. Step 6: Final answer
    x = 209,145.20

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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.