Home / 206,349.12-309,515.04-66,104.64

Finding the Fourth Proportional to 206,349.12, 309,515.04 and 66,104.64

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Solution

The fourth proportional to 206,349.12, 309,515.04 and 66,104.64 is: 99,154.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,349.12 : 309,515.04 = 66,104.64 : x
  2. Step 2: Convert to fraction form
    206,349.12/309,515.04 = 66,104.64/x
  3. Step 3: Cross multiply
    206,349.12x = 309,515.04 × 66,104.64
  4. Step 4: Simplify right side
    206,349.12x = 20,460,380,293.79
  5. Step 5: Solve for x
    x = 20,460,380,293.79/206,349.12
  6. Step 6: Final answer
    x = 99,154.19

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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.