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Finding the Fourth Proportional to 291,767.06, 437,650.59 and 81,405

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Solution

The fourth proportional to 291,767.06, 437,650.59 and 81,405 is: 122,107.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,767.06 : 437,650.59 = 81,405 : x
  2. Step 2: Convert to fraction form
    291,767.06/437,650.59 = 81,405/x
  3. Step 3: Cross multiply
    291,767.06x = 437,650.59 × 81,405
  4. Step 4: Simplify right side
    291,767.06x = 35,626,946,584.22
  5. Step 5: Solve for x
    x = 35,626,946,584.22/291,767.06
  6. Step 6: Final answer
    x = 122,107.50

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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.