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Finding the Fourth Proportional to 66,920.91, 100,381.41 and 20,173.77

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Solution

The fourth proportional to 66,920.91, 100,381.41 and 20,173.77 is: 30,260.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,920.91 : 100,381.41 = 20,173.77 : x
  2. Step 2: Convert to fraction form
    66,920.91/100,381.41 = 20,173.77/x
  3. Step 3: Cross multiply
    66,920.91x = 100,381.41 × 20,173.77
  4. Step 4: Simplify right side
    66,920.91x = 2,025,071,477.62
  5. Step 5: Solve for x
    x = 2,025,071,477.62/66,920.91
  6. Step 6: Final answer
    x = 30,260.67

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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.