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Finding the Fourth Proportional to 121,040.40, 181,560.60 and 115,921.20

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Solution

The fourth proportional to 121,040.40, 181,560.60 and 115,921.20 is: 173,881.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,040.40 : 181,560.60 = 115,921.20 : x
  2. Step 2: Convert to fraction form
    121,040.40/181,560.60 = 115,921.20/x
  3. Step 3: Cross multiply
    121,040.40x = 181,560.60 × 115,921.20
  4. Step 4: Simplify right side
    121,040.40x = 21,046,722,624.72
  5. Step 5: Solve for x
    x = 21,046,722,624.72/121,040.40
  6. Step 6: Final answer
    x = 173,881.80

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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.