Home / 291,727.20-437,536.80-81,321.60

Finding the Fourth Proportional to 291,727.20, 437,536.80 and 81,321.60

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Solution

The fourth proportional to 291,727.20, 437,536.80 and 81,321.60 is: 121,967.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,727.20 : 437,536.80 = 81,321.60 : x
  2. Step 2: Convert to fraction form
    291,727.20/437,536.80 = 81,321.60/x
  3. Step 3: Cross multiply
    291,727.20x = 437,536.80 × 81,321.60
  4. Step 4: Simplify right side
    291,727.20x = 35,581,192,634.88
  5. Step 5: Solve for x
    x = 35,581,192,634.88/291,727.20
  6. Step 6: Final answer
    x = 121,967.35

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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.