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Finding the Fourth Proportional to 436,659.63, 654,989.39 and 121,116.54

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Solution

The fourth proportional to 436,659.63, 654,989.39 and 121,116.54 is: 181,674.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,659.63 : 654,989.39 = 121,116.54 : x
  2. Step 2: Convert to fraction form
    436,659.63/654,989.39 = 121,116.54/x
  3. Step 3: Cross multiply
    436,659.63x = 654,989.39 × 121,116.54
  4. Step 4: Simplify right side
    436,659.63x = 79,330,045,378.56
  5. Step 5: Solve for x
    x = 79,330,045,378.56/436,659.63
  6. Step 6: Final answer
    x = 181,674.79

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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.