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Finding the Fourth Proportional to 143,908.80, 198,640.80 and 96,172.80

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Solution

The fourth proportional to 143,908.80, 198,640.80 and 96,172.80 is: 132,749.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,908.80 : 198,640.80 = 96,172.80 : x
  2. Step 2: Convert to fraction form
    143,908.80/198,640.80 = 96,172.80/x
  3. Step 3: Cross multiply
    143,908.80x = 198,640.80 × 96,172.80
  4. Step 4: Simplify right side
    143,908.80x = 19,103,841,930.24
  5. Step 5: Solve for x
    x = 19,103,841,930.24/143,908.80
  6. Step 6: Final answer
    x = 132,749.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.