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Finding the Fourth Proportional to 68,912.00, 103,375.16 and 18,992.11

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Solution

The fourth proportional to 68,912.00, 103,375.16 and 18,992.11 is: 28,490.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,912.00 : 103,375.16 = 18,992.11 : x
  2. Step 2: Convert to fraction form
    68,912.00/103,375.16 = 18,992.11/x
  3. Step 3: Cross multiply
    68,912.00x = 103,375.16 × 18,992.11
  4. Step 4: Simplify right side
    68,912.00x = 1,963,312,056.59
  5. Step 5: Solve for x
    x = 1,963,312,056.59/68,912.00
  6. Step 6: Final answer
    x = 28,490.13

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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.