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Finding the Fourth Proportional to 68,118.94, 102,194.81 and 21,371.81

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Solution

The fourth proportional to 68,118.94, 102,194.81 and 21,371.81 is: 32,062.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,118.94 : 102,194.81 = 21,371.81 : x
  2. Step 2: Convert to fraction form
    68,118.94/102,194.81 = 21,371.81/x
  3. Step 3: Cross multiply
    68,118.94x = 102,194.81 × 21,371.81
  4. Step 4: Simplify right side
    68,118.94x = 2,184,088,371.22
  5. Step 5: Solve for x
    x = 2,184,088,371.22/68,118.94
  6. Step 6: Final answer
    x = 32,062.87

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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.