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Finding the Fourth Proportional to 239,169.78, 330,065.55 and 135,811.44

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Solution

The fourth proportional to 239,169.78, 330,065.55 and 135,811.44 is: 187,426.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,169.78 : 330,065.55 = 135,811.44 : x
  2. Step 2: Convert to fraction form
    239,169.78/330,065.55 = 135,811.44/x
  3. Step 3: Cross multiply
    239,169.78x = 330,065.55 × 135,811.44
  4. Step 4: Simplify right side
    239,169.78x = 44,826,677,639.89
  5. Step 5: Solve for x
    x = 44,826,677,639.89/239,169.78
  6. Step 6: Final answer
    x = 187,426.18

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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.