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Finding the Fourth Proportional to 68,841.79, 103,242.83 and 18,923.51

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Solution

The fourth proportional to 68,841.79, 103,242.83 and 18,923.51 is: 28,379.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,841.79 : 103,242.83 = 18,923.51 : x
  2. Step 2: Convert to fraction form
    68,841.79/103,242.83 = 18,923.51/x
  3. Step 3: Cross multiply
    68,841.79x = 103,242.83 × 18,923.51
  4. Step 4: Simplify right side
    68,841.79x = 1,953,716,889.42
  5. Step 5: Solve for x
    x = 1,953,716,889.42/68,841.79
  6. Step 6: Final answer
    x = 28,379.81

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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.