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Finding the Fourth Proportional to 291,493, 437,239.50 and 81,136.41

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Solution

The fourth proportional to 291,493, 437,239.50 and 81,136.41 is: 121,704.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,493 : 437,239.50 = 81,136.41 : x
  2. Step 2: Convert to fraction form
    291,493/437,239.50 = 81,136.41/x
  3. Step 3: Cross multiply
    291,493x = 437,239.50 × 81,136.41
  4. Step 4: Simplify right side
    291,493x = 35,476,043,340.20
  5. Step 5: Solve for x
    x = 35,476,043,340.20/291,493
  6. Step 6: Final answer
    x = 121,704.62

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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.