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Finding the Fourth Proportional to 143,622.80, 215,434.20 and 131,181.20

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Solution

The fourth proportional to 143,622.80, 215,434.20 and 131,181.20 is: 196,771.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,622.80 : 215,434.20 = 131,181.20 : x
  2. Step 2: Convert to fraction form
    143,622.80/215,434.20 = 131,181.20/x
  3. Step 3: Cross multiply
    143,622.80x = 215,434.20 × 131,181.20
  4. Step 4: Simplify right side
    143,622.80x = 28,260,916,877.04
  5. Step 5: Solve for x
    x = 28,260,916,877.04/143,622.80
  6. Step 6: Final answer
    x = 196,771.80

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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.