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Finding the Fourth Proportional to 72,868.12, 100,563.16 and 40,604.88

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Solution

The fourth proportional to 72,868.12, 100,563.16 and 40,604.88 is: 56,037.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,868.12 : 100,563.16 = 40,604.88 : x
  2. Step 2: Convert to fraction form
    72,868.12/100,563.16 = 40,604.88/x
  3. Step 3: Cross multiply
    72,868.12x = 100,563.16 × 40,604.88
  4. Step 4: Simplify right side
    72,868.12x = 4,083,355,044.22
  5. Step 5: Solve for x
    x = 4,083,355,044.22/72,868.12
  6. Step 6: Final answer
    x = 56,037.61

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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.