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Finding the Fourth Proportional to 84,154, 126,231.96 and 21,820.72

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Solution

The fourth proportional to 84,154, 126,231.96 and 21,820.72 is: 32,731.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,154 : 126,231.96 = 21,820.72 : x
  2. Step 2: Convert to fraction form
    84,154/126,231.96 = 21,820.72/x
  3. Step 3: Cross multiply
    84,154x = 126,231.96 × 21,820.72
  4. Step 4: Simplify right side
    84,154x = 2,754,472,254.21
  5. Step 5: Solve for x
    x = 2,754,472,254.21/84,154
  6. Step 6: Final answer
    x = 32,731.33

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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.