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Finding the Fourth Proportional to 68,891.62, 103,338.63 and 18,971.46

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Solution

The fourth proportional to 68,891.62, 103,338.63 and 18,971.46 is: 28,457.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,891.62 : 103,338.63 = 18,971.46 : x
  2. Step 2: Convert to fraction form
    68,891.62/103,338.63 = 18,971.46/x
  3. Step 3: Cross multiply
    68,891.62x = 103,338.63 × 18,971.46
  4. Step 4: Simplify right side
    68,891.62x = 1,960,484,685.50
  5. Step 5: Solve for x
    x = 1,960,484,685.50/68,891.62
  6. Step 6: Final answer
    x = 28,457.52

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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.