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Finding the Fourth Proportional to 68,817, 94,968.90 and 39,009

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Solution

The fourth proportional to 68,817, 94,968.90 and 39,009 is: 53,833.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,817 : 94,968.90 = 39,009 : x
  2. Step 2: Convert to fraction form
    68,817/94,968.90 = 39,009/x
  3. Step 3: Cross multiply
    68,817x = 94,968.90 × 39,009
  4. Step 4: Simplify right side
    68,817x = 3,704,641,820.10
  5. Step 5: Solve for x
    x = 3,704,641,820.10/68,817
  6. Step 6: Final answer
    x = 53,833.24

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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.