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Finding the Fourth Proportional to 279,743.49, 419,206.99 and 139,308.93

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Solution

The fourth proportional to 279,743.49, 419,206.99 and 139,308.93 is: 208,760.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,743.49 : 419,206.99 = 139,308.93 : x
  2. Step 2: Convert to fraction form
    279,743.49/419,206.99 = 139,308.93/x
  3. Step 3: Cross multiply
    279,743.49x = 419,206.99 × 139,308.93
  4. Step 4: Simplify right side
    279,743.49x = 58,399,277,225.42
  5. Step 5: Solve for x
    x = 58,399,277,225.42/279,743.49
  6. Step 6: Final answer
    x = 208,760.09

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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.