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Finding the Fourth Proportional to 68,891.04, 103,322.88 and 18,958.32

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Solution

The fourth proportional to 68,891.04, 103,322.88 and 18,958.32 is: 28,433.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,891.04 : 103,322.88 = 18,958.32 : x
  2. Step 2: Convert to fraction form
    68,891.04/103,322.88 = 18,958.32/x
  3. Step 3: Cross multiply
    68,891.04x = 103,322.88 × 18,958.32
  4. Step 4: Simplify right side
    68,891.04x = 1,958,828,222.36
  5. Step 5: Solve for x
    x = 1,958,828,222.36/68,891.04
  6. Step 6: Final answer
    x = 28,433.72

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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.