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Finding the Fourth Proportional to 195,424.40, 293,136.60 and 128,939.60

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Solution

The fourth proportional to 195,424.40, 293,136.60 and 128,939.60 is: 193,409.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    195,424.40 : 293,136.60 = 128,939.60 : x
  2. Step 2: Convert to fraction form
    195,424.40/293,136.60 = 128,939.60/x
  3. Step 3: Cross multiply
    195,424.40x = 293,136.60 × 128,939.60
  4. Step 4: Simplify right side
    195,424.40x = 37,796,915,949.36
  5. Step 5: Solve for x
    x = 37,796,915,949.36/195,424.40
  6. Step 6: Final answer
    x = 193,409.40

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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.