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Finding the Fourth Proportional to 291,591.99, 437,388 and 81,229.32

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Solution

The fourth proportional to 291,591.99, 437,388 and 81,229.32 is: 121,843.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,591.99 : 437,388 = 81,229.32 : x
  2. Step 2: Convert to fraction form
    291,591.99/437,388 = 81,229.32/x
  3. Step 3: Cross multiply
    291,591.99x = 437,388 × 81,229.32
  4. Step 4: Simplify right side
    291,591.99x = 35,528,729,816.16
  5. Step 5: Solve for x
    x = 35,528,729,816.16/291,591.99
  6. Step 6: Final answer
    x = 121,843.98

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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.