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Finding the Fourth Proportional to 291,760.08, 437,664.60 and 81,400.56

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Solution

The fourth proportional to 291,760.08, 437,664.60 and 81,400.56 is: 122,107.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,760.08 : 437,664.60 = 81,400.56 : x
  2. Step 2: Convert to fraction form
    291,760.08/437,664.60 = 81,400.56/x
  3. Step 3: Cross multiply
    291,760.08x = 437,664.60 × 81,400.56
  4. Step 4: Simplify right side
    291,760.08x = 35,626,143,532.18
  5. Step 5: Solve for x
    x = 35,626,143,532.18/291,760.08
  6. Step 6: Final answer
    x = 122,107.67

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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.