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Finding the Fourth Proportional to 76,617.99, 115,033.61 and 39,203.89

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Solution

The fourth proportional to 76,617.99, 115,033.61 and 39,203.89 is: 58,860.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,617.99 : 115,033.61 = 39,203.89 : x
  2. Step 2: Convert to fraction form
    76,617.99/115,033.61 = 39,203.89/x
  3. Step 3: Cross multiply
    76,617.99x = 115,033.61 × 39,203.89
  4. Step 4: Simplify right side
    76,617.99x = 4,509,764,796.72
  5. Step 5: Solve for x
    x = 4,509,764,796.72/76,617.99
  6. Step 6: Final answer
    x = 58,860.39

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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.