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Finding the Fourth Proportional to 68,268.76, 102,420.40 and 19,020.76

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Solution

The fourth proportional to 68,268.76, 102,420.40 and 19,020.76 is: 28,535.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,268.76 : 102,420.40 = 19,020.76 : x
  2. Step 2: Convert to fraction form
    68,268.76/102,420.40 = 19,020.76/x
  3. Step 3: Cross multiply
    68,268.76x = 102,420.40 × 19,020.76
  4. Step 4: Simplify right side
    68,268.76x = 1,948,113,847.50
  5. Step 5: Solve for x
    x = 1,948,113,847.50/68,268.76
  6. Step 6: Final answer
    x = 28,535.95

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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.