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Finding the Fourth Proportional to 49,866.80, 74,704.20 and 39,280.80

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Solution

The fourth proportional to 49,866.80, 74,704.20 and 39,280.80 is: 58,845.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,866.80 : 74,704.20 = 39,280.80 : x
  2. Step 2: Convert to fraction form
    49,866.80/74,704.20 = 39,280.80/x
  3. Step 3: Cross multiply
    49,866.80x = 74,704.20 × 39,280.80
  4. Step 4: Simplify right side
    49,866.80x = 2,934,440,739.36
  5. Step 5: Solve for x
    x = 2,934,440,739.36/49,866.80
  6. Step 6: Final answer
    x = 58,845.58

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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.