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Finding the Fourth Proportional to 81,370.68, 122,056.44 and 28,780.22

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Solution

The fourth proportional to 81,370.68, 122,056.44 and 28,780.22 is: 43,170.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,370.68 : 122,056.44 = 28,780.22 : x
  2. Step 2: Convert to fraction form
    81,370.68/122,056.44 = 28,780.22/x
  3. Step 3: Cross multiply
    81,370.68x = 122,056.44 × 28,780.22
  4. Step 4: Simplify right side
    81,370.68x = 3,512,811,195.62
  5. Step 5: Solve for x
    x = 3,512,811,195.62/81,370.68
  6. Step 6: Final answer
    x = 43,170.48

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1.5x scale

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.