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Finding the Fourth Proportional to 76,804.92, 115,216.59 and 72,605.88

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Solution

The fourth proportional to 76,804.92, 115,216.59 and 72,605.88 is: 108,917.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,804.92 : 115,216.59 = 72,605.88 : x
  2. Step 2: Convert to fraction form
    76,804.92/115,216.59 = 72,605.88/x
  3. Step 3: Cross multiply
    76,804.92x = 115,216.59 × 72,605.88
  4. Step 4: Simplify right side
    76,804.92x = 8,365,401,907.55
  5. Step 5: Solve for x
    x = 8,365,401,907.55/76,804.92
  6. Step 6: Final answer
    x = 108,917.53

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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.