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Finding the Fourth Proportional to 68,842.10, 103,261.91 and 18,922.01

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Solution

The fourth proportional to 68,842.10, 103,261.91 and 18,922.01 is: 28,382.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,842.10 : 103,261.91 = 18,922.01 : x
  2. Step 2: Convert to fraction form
    68,842.10/103,261.91 = 18,922.01/x
  3. Step 3: Cross multiply
    68,842.10x = 103,261.91 × 18,922.01
  4. Step 4: Simplify right side
    68,842.10x = 1,953,922,282.72
  5. Step 5: Solve for x
    x = 1,953,922,282.72/68,842.10
  6. Step 6: Final answer
    x = 28,382.66

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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.