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Finding the Fourth Proportional to 72,874.15, 100,567.37 and 40,607.87

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Solution

The fourth proportional to 72,874.15, 100,567.37 and 40,607.87 is: 56,039.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,874.15 : 100,567.37 = 40,607.87 : x
  2. Step 2: Convert to fraction form
    72,874.15/100,567.37 = 40,607.87/x
  3. Step 3: Cross multiply
    72,874.15x = 100,567.37 × 40,607.87
  4. Step 4: Simplify right side
    72,874.15x = 4,083,826,285.88
  5. Step 5: Solve for x
    x = 4,083,826,285.88/72,874.15
  6. Step 6: Final answer
    x = 56,039.44

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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.