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Finding the Fourth Proportional to 239,872.50, 331,053.21 and 139,270.50

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Solution

The fourth proportional to 239,872.50, 331,053.21 and 139,270.50 is: 192,210.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,872.50 : 331,053.21 = 139,270.50 : x
  2. Step 2: Convert to fraction form
    239,872.50/331,053.21 = 139,270.50/x
  3. Step 3: Cross multiply
    239,872.50x = 331,053.21 × 139,270.50
  4. Step 4: Simplify right side
    239,872.50x = 46,105,946,083.31
  5. Step 5: Solve for x
    x = 46,105,946,083.31/239,872.50
  6. Step 6: Final answer
    x = 192,210.22

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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.