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Finding the Fourth Proportional to 72,804.94, 100,474.05 and 40,975.90

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Solution

The fourth proportional to 72,804.94, 100,474.05 and 40,975.90 is: 56,548.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,804.94 : 100,474.05 = 40,975.90 : x
  2. Step 2: Convert to fraction form
    72,804.94/100,474.05 = 40,975.90/x
  3. Step 3: Cross multiply
    72,804.94x = 100,474.05 × 40,975.90
  4. Step 4: Simplify right side
    72,804.94x = 4,117,014,625.40
  5. Step 5: Solve for x
    x = 4,117,014,625.40/72,804.94
  6. Step 6: Final answer
    x = 56,548.56

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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.