Home / 81,205.10-121,814.44-21,233.45

Finding the Fourth Proportional to 81,205.10, 121,814.44 and 21,233.45

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Solution

The fourth proportional to 81,205.10, 121,814.44 and 21,233.45 is: 31,851.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,205.10 : 121,814.44 = 21,233.45 : x
  2. Step 2: Convert to fraction form
    81,205.10/121,814.44 = 21,233.45/x
  3. Step 3: Cross multiply
    81,205.10x = 121,814.44 × 21,233.45
  4. Step 4: Simplify right side
    81,205.10x = 2,586,541,072.47
  5. Step 5: Solve for x
    x = 2,586,541,072.47/81,205.10
  6. Step 6: Final answer
    x = 31,851.96

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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.