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Finding the Fourth Proportional to 143,231.40, 214,847.10 and 139,732.20

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Solution

The fourth proportional to 143,231.40, 214,847.10 and 139,732.20 is: 209,598.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,231.40 : 214,847.10 = 139,732.20 : x
  2. Step 2: Convert to fraction form
    143,231.40/214,847.10 = 139,732.20/x
  3. Step 3: Cross multiply
    143,231.40x = 214,847.10 × 139,732.20
  4. Step 4: Simplify right side
    143,231.40x = 30,021,057,946.62
  5. Step 5: Solve for x
    x = 30,021,057,946.62/143,231.40
  6. Step 6: Final answer
    x = 209,598.30

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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.