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Finding the Fourth Proportional to 110,905.40, 166,371.90 and 43,428.72

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Solution

The fourth proportional to 110,905.40, 166,371.90 and 43,428.72 is: 65,148.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,905.40 : 166,371.90 = 43,428.72 : x
  2. Step 2: Convert to fraction form
    110,905.40/166,371.90 = 43,428.72/x
  3. Step 3: Cross multiply
    110,905.40x = 166,371.90 × 43,428.72
  4. Step 4: Simplify right side
    110,905.40x = 7,225,318,660.97
  5. Step 5: Solve for x
    x = 7,225,318,660.97/110,905.40
  6. Step 6: Final answer
    x = 65,148.48

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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.