Home / 81,634.35-122,428.33-31,703.79

Finding the Fourth Proportional to 81,634.35, 122,428.33 and 31,703.79

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Solution

The fourth proportional to 81,634.35, 122,428.33 and 31,703.79 is: 47,546.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,634.35 : 122,428.33 = 31,703.79 : x
  2. Step 2: Convert to fraction form
    81,634.35/122,428.33 = 31,703.79/x
  3. Step 3: Cross multiply
    81,634.35x = 122,428.33 × 31,703.79
  4. Step 4: Simplify right side
    81,634.35x = 3,881,442,064.37
  5. Step 5: Solve for x
    x = 3,881,442,064.37/81,634.35
  6. Step 6: Final answer
    x = 47,546.68

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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.