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Finding the Fourth Proportional to 272,249.40, 408,046.05 and 139,061.10

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Solution

The fourth proportional to 272,249.40, 408,046.05 and 139,061.10 is: 208,424.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,249.40 : 408,046.05 = 139,061.10 : x
  2. Step 2: Convert to fraction form
    272,249.40/408,046.05 = 139,061.10/x
  3. Step 3: Cross multiply
    272,249.40x = 408,046.05 × 139,061.10
  4. Step 4: Simplify right side
    272,249.40x = 56,743,332,563.66
  5. Step 5: Solve for x
    x = 56,743,332,563.66/272,249.40
  6. Step 6: Final answer
    x = 208,424.09

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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.