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Finding the Fourth Proportional to 100,343.56, 138,474.12 and 54,403.36

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Solution

The fourth proportional to 100,343.56, 138,474.12 and 54,403.36 is: 75,076.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,343.56 : 138,474.12 = 54,403.36 : x
  2. Step 2: Convert to fraction form
    100,343.56/138,474.12 = 54,403.36/x
  3. Step 3: Cross multiply
    100,343.56x = 138,474.12 × 54,403.36
  4. Step 4: Simplify right side
    100,343.56x = 7,533,457,401.04
  5. Step 5: Solve for x
    x = 7,533,457,401.04/100,343.56
  6. Step 6: Final answer
    x = 75,076.64

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.