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Finding the Fourth Proportional to 440,611.12, 660,917.09 and 120,765.61

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Solution

The fourth proportional to 440,611.12, 660,917.09 and 120,765.61 is: 181,148.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,611.12 : 660,917.09 = 120,765.61 : x
  2. Step 2: Convert to fraction form
    440,611.12/660,917.09 = 120,765.61/x
  3. Step 3: Cross multiply
    440,611.12x = 660,917.09 × 120,765.61
  4. Step 4: Simplify right side
    440,611.12x = 79,816,055,533.27
  5. Step 5: Solve for x
    x = 79,816,055,533.27/440,611.12
  6. Step 6: Final answer
    x = 181,148.53

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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.