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Finding the Fourth Proportional to 279,871.07, 419,941.59 and 137,639.19

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Solution

The fourth proportional to 279,871.07, 419,941.59 and 137,639.19 is: 206,525.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,871.07 : 419,941.59 = 137,639.19 : x
  2. Step 2: Convert to fraction form
    279,871.07/419,941.59 = 137,639.19/x
  3. Step 3: Cross multiply
    279,871.07x = 419,941.59 × 137,639.19
  4. Step 4: Simplify right side
    279,871.07x = 57,800,418,787.94
  5. Step 5: Solve for x
    x = 57,800,418,787.94/279,871.07
  6. Step 6: Final answer
    x = 206,525.16

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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.