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Finding the Fourth Proportional to 68,190, 102,288.65 and 21,446.52

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Solution

The fourth proportional to 68,190, 102,288.65 and 21,446.52 is: 32,170.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,190 : 102,288.65 = 21,446.52 : x
  2. Step 2: Convert to fraction form
    68,190/102,288.65 = 21,446.52/x
  3. Step 3: Cross multiply
    68,190x = 102,288.65 × 21,446.52
  4. Step 4: Simplify right side
    68,190x = 2,193,735,470.77
  5. Step 5: Solve for x
    x = 2,193,735,470.77/68,190
  6. Step 6: Final answer
    x = 32,170.93

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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.