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Finding the Fourth Proportional to 68,908.56, 103,349.16 and 18,975.72

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Solution

The fourth proportional to 68,908.56, 103,349.16 and 18,975.72 is: 28,459.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,908.56 : 103,349.16 = 18,975.72 : x
  2. Step 2: Convert to fraction form
    68,908.56/103,349.16 = 18,975.72/x
  3. Step 3: Cross multiply
    68,908.56x = 103,349.16 × 18,975.72
  4. Step 4: Simplify right side
    68,908.56x = 1,961,124,722.40
  5. Step 5: Solve for x
    x = 1,961,124,722.40/68,908.56
  6. Step 6: Final answer
    x = 28,459.81

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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.