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Finding the Fourth Proportional to 143,896.40, 215,844.60 and 142,974.80

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Solution

The fourth proportional to 143,896.40, 215,844.60 and 142,974.80 is: 214,462.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,896.40 : 215,844.60 = 142,974.80 : x
  2. Step 2: Convert to fraction form
    143,896.40/215,844.60 = 142,974.80/x
  3. Step 3: Cross multiply
    143,896.40x = 215,844.60 × 142,974.80
  4. Step 4: Simplify right side
    143,896.40x = 30,860,338,516.08
  5. Step 5: Solve for x
    x = 30,860,338,516.08/143,896.40
  6. Step 6: Final answer
    x = 214,462.20

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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.