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Finding the Fourth Proportional to 291,449.47, 437,171.77 and 81,086.80

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Solution

The fourth proportional to 291,449.47, 437,171.77 and 81,086.80 is: 121,629.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,449.47 : 437,171.77 = 81,086.80 : x
  2. Step 2: Convert to fraction form
    291,449.47/437,171.77 = 81,086.80/x
  3. Step 3: Cross multiply
    291,449.47x = 437,171.77 × 81,086.80
  4. Step 4: Simplify right side
    291,449.47x = 35,448,857,288.34
  5. Step 5: Solve for x
    x = 35,448,857,288.34/291,449.47
  6. Step 6: Final answer
    x = 121,629.52

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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.