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Finding the Fourth Proportional to 203,861.79, 305,671.55 and 77,511.29

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Solution

The fourth proportional to 203,861.79, 305,671.55 and 77,511.29 is: 116,220.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,861.79 : 305,671.55 = 77,511.29 : x
  2. Step 2: Convert to fraction form
    203,861.79/305,671.55 = 77,511.29/x
  3. Step 3: Cross multiply
    203,861.79x = 305,671.55 × 77,511.29
  4. Step 4: Simplify right side
    203,861.79x = 23,692,994,240.89
  5. Step 5: Solve for x
    x = 23,692,994,240.89/203,861.79
  6. Step 6: Final answer
    x = 116,220.87

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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.