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Finding the Fourth Proportional to 68,790.31, 103,168.14 and 26,655.91

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Solution

The fourth proportional to 68,790.31, 103,168.14 and 26,655.91 is: 39,977.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,790.31 : 103,168.14 = 26,655.91 : x
  2. Step 2: Convert to fraction form
    68,790.31/103,168.14 = 26,655.91/x
  3. Step 3: Cross multiply
    68,790.31x = 103,168.14 × 26,655.91
  4. Step 4: Simplify right side
    68,790.31x = 2,750,040,654.71
  5. Step 5: Solve for x
    x = 2,750,040,654.71/68,790.31
  6. Step 6: Final answer
    x = 39,977.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.