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Finding the Fourth Proportional to 66,960.65, 100,438.08 and 20,212.13

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Solution

The fourth proportional to 66,960.65, 100,438.08 and 20,212.13 is: 30,317.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,960.65 : 100,438.08 = 20,212.13 : x
  2. Step 2: Convert to fraction form
    66,960.65/100,438.08 = 20,212.13/x
  3. Step 3: Cross multiply
    66,960.65x = 100,438.08 × 20,212.13
  4. Step 4: Simplify right side
    66,960.65x = 2,030,067,027.72
  5. Step 5: Solve for x
    x = 2,030,067,027.72/66,960.65
  6. Step 6: Final answer
    x = 30,317.32

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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.