Home / 81,917.39-122,780.21-31,283.25

Finding the Fourth Proportional to 81,917.39, 122,780.21 and 31,283.25

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Solution

The fourth proportional to 81,917.39, 122,780.21 and 31,283.25 is: 46,888.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,917.39 : 122,780.21 = 31,283.25 : x
  2. Step 2: Convert to fraction form
    81,917.39/122,780.21 = 31,283.25/x
  3. Step 3: Cross multiply
    81,917.39x = 122,780.21 × 31,283.25
  4. Step 4: Simplify right side
    81,917.39x = 3,840,963,387.64
  5. Step 5: Solve for x
    x = 3,840,963,387.64/81,917.39
  6. Step 6: Final answer
    x = 46,888.25

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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.