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Finding the Fourth Proportional to 96,722.60, 144,930.30 and 81,055.40

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Solution

The fourth proportional to 96,722.60, 144,930.30 and 81,055.40 is: 121,454.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,722.60 : 144,930.30 = 81,055.40 : x
  2. Step 2: Convert to fraction form
    96,722.60/144,930.30 = 81,055.40/x
  3. Step 3: Cross multiply
    96,722.60x = 144,930.30 × 81,055.40
  4. Step 4: Simplify right side
    96,722.60x = 11,747,383,438.62
  5. Step 5: Solve for x
    x = 11,747,383,438.62/96,722.60
  6. Step 6: Final answer
    x = 121,454.38

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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.