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Finding the Fourth Proportional to 133,090.60, 199,635.90 and 120,843.40

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Solution

The fourth proportional to 133,090.60, 199,635.90 and 120,843.40 is: 181,265.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,090.60 : 199,635.90 = 120,843.40 : x
  2. Step 2: Convert to fraction form
    133,090.60/199,635.90 = 120,843.40/x
  3. Step 3: Cross multiply
    133,090.60x = 199,635.90 × 120,843.40
  4. Step 4: Simplify right side
    133,090.60x = 24,124,680,918.06
  5. Step 5: Solve for x
    x = 24,124,680,918.06/133,090.60
  6. Step 6: Final answer
    x = 181,265.10

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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.