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Finding the Fourth Proportional to 143,798.20, 215,697.30 and 80,812.60

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Solution

The fourth proportional to 143,798.20, 215,697.30 and 80,812.60 is: 121,218.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,798.20 : 215,697.30 = 80,812.60 : x
  2. Step 2: Convert to fraction form
    143,798.20/215,697.30 = 80,812.60/x
  3. Step 3: Cross multiply
    143,798.20x = 215,697.30 × 80,812.60
  4. Step 4: Simplify right side
    143,798.20x = 17,431,059,625.98
  5. Step 5: Solve for x
    x = 17,431,059,625.98/143,798.20
  6. Step 6: Final answer
    x = 121,218.90

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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.