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Finding the Fourth Proportional to 500,989.49, 751,485.77 and 121,910.28

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Solution

The fourth proportional to 500,989.49, 751,485.77 and 121,910.28 is: 182,865.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,989.49 : 751,485.77 = 121,910.28 : x
  2. Step 2: Convert to fraction form
    500,989.49/751,485.77 = 121,910.28/x
  3. Step 3: Cross multiply
    500,989.49x = 751,485.77 × 121,910.28
  4. Step 4: Simplify right side
    500,989.49x = 91,613,840,027.16
  5. Step 5: Solve for x
    x = 91,613,840,027.16/500,989.49
  6. Step 6: Final answer
    x = 182,865.79

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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.