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Finding the Fourth Proportional to 72,739.06, 100,379.91 and 40,907.95

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Solution

The fourth proportional to 72,739.06, 100,379.91 and 40,907.95 is: 56,452.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,739.06 : 100,379.91 = 40,907.95 : x
  2. Step 2: Convert to fraction form
    72,739.06/100,379.91 = 40,907.95/x
  3. Step 3: Cross multiply
    72,739.06x = 100,379.91 × 40,907.95
  4. Step 4: Simplify right side
    72,739.06x = 4,106,336,576.27
  5. Step 5: Solve for x
    x = 4,106,336,576.27/72,739.06
  6. Step 6: Final answer
    x = 56,452.98

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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.