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Finding the Fourth Proportional to 203,393.60, 305,093.56 and 76,999.91

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Solution

The fourth proportional to 203,393.60, 305,093.56 and 76,999.91 is: 115,501.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,393.60 : 305,093.56 = 76,999.91 : x
  2. Step 2: Convert to fraction form
    203,393.60/305,093.56 = 76,999.91/x
  3. Step 3: Cross multiply
    203,393.60x = 305,093.56 × 76,999.91
  4. Step 4: Simplify right side
    203,393.60x = 23,492,176,661.58
  5. Step 5: Solve for x
    x = 23,492,176,661.58/203,393.60
  6. Step 6: Final answer
    x = 115,501.06

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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.