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Finding the Fourth Proportional to 203,916.60, 305,918.10 and 61,750.20

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Solution

The fourth proportional to 203,916.60, 305,918.10 and 61,750.20 is: 92,638.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,916.60 : 305,918.10 = 61,750.20 : x
  2. Step 2: Convert to fraction form
    203,916.60/305,918.10 = 61,750.20/x
  3. Step 3: Cross multiply
    203,916.60x = 305,918.10 × 61,750.20
  4. Step 4: Simplify right side
    203,916.60x = 18,890,503,858.62
  5. Step 5: Solve for x
    x = 18,890,503,858.62/203,916.60
  6. Step 6: Final answer
    x = 92,638.38

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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.