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Finding the Fourth Proportional to 68,290, 102,438.84 and 19,045.84

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Solution

The fourth proportional to 68,290, 102,438.84 and 19,045.84 is: 28,569.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,290 : 102,438.84 = 19,045.84 : x
  2. Step 2: Convert to fraction form
    68,290/102,438.84 = 19,045.84/x
  3. Step 3: Cross multiply
    68,290x = 102,438.84 × 19,045.84
  4. Step 4: Simplify right side
    68,290x = 1,951,033,756.43
  5. Step 5: Solve for x
    x = 1,951,033,756.43/68,290
  6. Step 6: Final answer
    x = 28,569.83

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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.