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Finding the Fourth Proportional to 291,383.38, 437,099.82 and 81,021.32

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Solution

The fourth proportional to 291,383.38, 437,099.82 and 81,021.32 is: 121,538.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,383.38 : 437,099.82 = 81,021.32 : x
  2. Step 2: Convert to fraction form
    291,383.38/437,099.82 = 81,021.32/x
  3. Step 3: Cross multiply
    291,383.38x = 437,099.82 × 81,021.32
  4. Step 4: Simplify right side
    291,383.38x = 35,414,402,202.66
  5. Step 5: Solve for x
    x = 35,414,402,202.66/291,383.38
  6. Step 6: Final answer
    x = 121,538.86

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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.