Home / 143,090.20-214,635.30-90,731.80

Finding the Fourth Proportional to 143,090.20, 214,635.30 and 90,731.80

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Solution

The fourth proportional to 143,090.20, 214,635.30 and 90,731.80 is: 136,097.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,090.20 : 214,635.30 = 90,731.80 : x
  2. Step 2: Convert to fraction form
    143,090.20/214,635.30 = 90,731.80/x
  3. Step 3: Cross multiply
    143,090.20x = 214,635.30 × 90,731.80
  4. Step 4: Simplify right side
    143,090.20x = 19,474,247,112.54
  5. Step 5: Solve for x
    x = 19,474,247,112.54/143,090.20
  6. Step 6: Final answer
    x = 136,097.70

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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.