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Finding the Fourth Proportional to 72,907, 100,611.68 and 39,373

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Solution

The fourth proportional to 72,907, 100,611.68 and 39,373 is: 54,334.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,907 : 100,611.68 = 39,373 : x
  2. Step 2: Convert to fraction form
    72,907/100,611.68 = 39,373/x
  3. Step 3: Cross multiply
    72,907x = 100,611.68 × 39,373
  4. Step 4: Simplify right side
    72,907x = 3,961,383,676.64
  5. Step 5: Solve for x
    x = 3,961,383,676.64/72,907
  6. Step 6: Final answer
    x = 54,334.75

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.