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Finding the Fourth Proportional to 68,118.40, 102,187.20 and 21,366.40

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Solution

The fourth proportional to 68,118.40, 102,187.20 and 21,366.40 is: 32,052.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,118.40 : 102,187.20 = 21,366.40 : x
  2. Step 2: Convert to fraction form
    68,118.40/102,187.20 = 21,366.40/x
  3. Step 3: Cross multiply
    68,118.40x = 102,187.20 × 21,366.40
  4. Step 4: Simplify right side
    68,118.40x = 2,183,372,590.08
  5. Step 5: Solve for x
    x = 2,183,372,590.08/68,118.40
  6. Step 6: Final answer
    x = 32,052.61

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1.5x scale

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.