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Finding the Fourth Proportional to 137,136.90, 205,787.10 and 61,229.54

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Solution

The fourth proportional to 137,136.90, 205,787.10 and 61,229.54 is: 91,880.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,136.90 : 205,787.10 = 61,229.54 : x
  2. Step 2: Convert to fraction form
    137,136.90/205,787.10 = 61,229.54/x
  3. Step 3: Cross multiply
    137,136.90x = 205,787.10 × 61,229.54
  4. Step 4: Simplify right side
    137,136.90x = 12,600,249,470.93
  5. Step 5: Solve for x
    x = 12,600,249,470.93/137,136.90
  6. Step 6: Final answer
    x = 91,880.81

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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.