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Finding the Fourth Proportional to 99,960.89, 137,942.21 and 54,638.48

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Solution

The fourth proportional to 99,960.89, 137,942.21 and 54,638.48 is: 75,399.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,960.89 : 137,942.21 = 54,638.48 : x
  2. Step 2: Convert to fraction form
    99,960.89/137,942.21 = 54,638.48/x
  3. Step 3: Cross multiply
    99,960.89x = 137,942.21 × 54,638.48
  4. Step 4: Simplify right side
    99,960.89x = 7,536,951,719.34
  5. Step 5: Solve for x
    x = 7,536,951,719.34/99,960.89
  6. Step 6: Final answer
    x = 75,399.01

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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.