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Finding the Fourth Proportional to 68,700.92, 103,066.14 and 21,314.96

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Solution

The fourth proportional to 68,700.92, 103,066.14 and 21,314.96 is: 31,977.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,700.92 : 103,066.14 = 21,314.96 : x
  2. Step 2: Convert to fraction form
    68,700.92/103,066.14 = 21,314.96/x
  3. Step 3: Cross multiply
    68,700.92x = 103,066.14 × 21,314.96
  4. Step 4: Simplify right side
    68,700.92x = 2,196,850,651.45
  5. Step 5: Solve for x
    x = 2,196,850,651.45/68,700.92
  6. Step 6: Final answer
    x = 31,977.02

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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.