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Finding the Fourth Proportional to 96,780.60, 144,998.10 and 81,919.80

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Solution

The fourth proportional to 96,780.60, 144,998.10 and 81,919.80 is: 122,733.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,780.60 : 144,998.10 = 81,919.80 : x
  2. Step 2: Convert to fraction form
    96,780.60/144,998.10 = 81,919.80/x
  3. Step 3: Cross multiply
    96,780.60x = 144,998.10 × 81,919.80
  4. Step 4: Simplify right side
    96,780.60x = 11,878,215,352.38
  5. Step 5: Solve for x
    x = 11,878,215,352.38/96,780.60
  6. Step 6: Final answer
    x = 122,733.43

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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.