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Finding the Fourth Proportional to 68,756.65, 103,164.38 and 28,784.97

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Solution

The fourth proportional to 68,756.65, 103,164.38 and 28,784.97 is: 43,189.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,756.65 : 103,164.38 = 28,784.97 : x
  2. Step 2: Convert to fraction form
    68,756.65/103,164.38 = 28,784.97/x
  3. Step 3: Cross multiply
    68,756.65x = 103,164.38 × 28,784.97
  4. Step 4: Simplify right side
    68,756.65x = 2,969,583,583.37
  5. Step 5: Solve for x
    x = 2,969,583,583.37/68,756.65
  6. Step 6: Final answer
    x = 43,189.77

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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.