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Finding the Fourth Proportional to 68,918.86, 103,312.68 and 22,138.94

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Solution

The fourth proportional to 68,918.86, 103,312.68 and 22,138.94 is: 33,187.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,918.86 : 103,312.68 = 22,138.94 : x
  2. Step 2: Convert to fraction form
    68,918.86/103,312.68 = 22,138.94/x
  3. Step 3: Cross multiply
    68,918.86x = 103,312.68 × 22,138.94
  4. Step 4: Simplify right side
    68,918.86x = 2,287,233,223.76
  5. Step 5: Solve for x
    x = 2,287,233,223.76/68,918.86
  6. Step 6: Final answer
    x = 33,187.33

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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.