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Finding the Fourth Proportional to 135,907.56, 204,193.62 and 128,354.04

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Solution

The fourth proportional to 135,907.56, 204,193.62 and 128,354.04 is: 192,844.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,907.56 : 204,193.62 = 128,354.04 : x
  2. Step 2: Convert to fraction form
    135,907.56/204,193.62 = 128,354.04/x
  3. Step 3: Cross multiply
    135,907.56x = 204,193.62 × 128,354.04
  4. Step 4: Simplify right side
    135,907.56x = 26,209,076,069.22
  5. Step 5: Solve for x
    x = 26,209,076,069.22/135,907.56
  6. Step 6: Final answer
    x = 192,844.87

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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.