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Finding the Fourth Proportional to 121,003.20, 181,569.60 and 54,453.60

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Solution

The fourth proportional to 121,003.20, 181,569.60 and 54,453.60 is: 81,709.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,003.20 : 181,569.60 = 54,453.60 : x
  2. Step 2: Convert to fraction form
    121,003.20/181,569.60 = 54,453.60/x
  3. Step 3: Cross multiply
    121,003.20x = 181,569.60 × 54,453.60
  4. Step 4: Simplify right side
    121,003.20x = 9,887,118,370.56
  5. Step 5: Solve for x
    x = 9,887,118,370.56/121,003.20
  6. Step 6: Final answer
    x = 81,709.56

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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.