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Finding the Fourth Proportional to 206,114.40, 309,171.60 and 143,128.80

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Solution

The fourth proportional to 206,114.40, 309,171.60 and 143,128.80 is: 214,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,114.40 : 309,171.60 = 143,128.80 : x
  2. Step 2: Convert to fraction form
    206,114.40/309,171.60 = 143,128.80/x
  3. Step 3: Cross multiply
    206,114.40x = 309,171.60 × 143,128.80
  4. Step 4: Simplify right side
    206,114.40x = 44,251,360,102.08
  5. Step 5: Solve for x
    x = 44,251,360,102.08/206,114.40
  6. Step 6: Final answer
    x = 214,693.20

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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.