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Finding the Fourth Proportional to 108,090.40, 162,049.20 and 45,709.60

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Solution

The fourth proportional to 108,090.40, 162,049.20 and 45,709.60 is: 68,527.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,090.40 : 162,049.20 = 45,709.60 : x
  2. Step 2: Convert to fraction form
    108,090.40/162,049.20 = 45,709.60/x
  3. Step 3: Cross multiply
    108,090.40x = 162,049.20 × 45,709.60
  4. Step 4: Simplify right side
    108,090.40x = 7,407,204,112.32
  5. Step 5: Solve for x
    x = 7,407,204,112.32/108,090.40
  6. Step 6: Final answer
    x = 68,527.86

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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.