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Finding the Fourth Proportional to 291,761.48, 437,716 and 81,399.26

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Solution

The fourth proportional to 291,761.48, 437,716 and 81,399.26 is: 122,119.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,761.48 : 437,716 = 81,399.26 : x
  2. Step 2: Convert to fraction form
    291,761.48/437,716 = 81,399.26/x
  3. Step 3: Cross multiply
    291,761.48x = 437,716 × 81,399.26
  4. Step 4: Simplify right side
    291,761.48x = 35,629,758,490.16
  5. Step 5: Solve for x
    x = 35,629,758,490.16/291,761.48
  6. Step 6: Final answer
    x = 122,119.47

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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.