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Finding the Fourth Proportional to 68,798.55, 103,197.93 and 18,879.33

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Solution

The fourth proportional to 68,798.55, 103,197.93 and 18,879.33 is: 28,319.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,798.55 : 103,197.93 = 18,879.33 : x
  2. Step 2: Convert to fraction form
    68,798.55/103,197.93 = 18,879.33/x
  3. Step 3: Cross multiply
    68,798.55x = 103,197.93 × 18,879.33
  4. Step 4: Simplify right side
    68,798.55x = 1,948,307,775.79
  5. Step 5: Solve for x
    x = 1,948,307,775.79/68,798.55
  6. Step 6: Final answer
    x = 28,319.02

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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.