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Finding the Fourth Proportional to 279,741.49, 419,203.99 and 139,306.93

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Solution

The fourth proportional to 279,741.49, 419,203.99 and 139,306.93 is: 208,757.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,741.49 : 419,203.99 = 139,306.93 : x
  2. Step 2: Convert to fraction form
    279,741.49/419,203.99 = 139,306.93/x
  3. Step 3: Cross multiply
    279,741.49x = 419,203.99 × 139,306.93
  4. Step 4: Simplify right side
    279,741.49x = 58,398,020,890.65
  5. Step 5: Solve for x
    x = 58,398,020,890.65/279,741.49
  6. Step 6: Final answer
    x = 208,757.10

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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.