Home / 84,936.60-127,418.72-31,628.78

Finding the Fourth Proportional to 84,936.60, 127,418.72 and 31,628.78

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Solution

The fourth proportional to 84,936.60, 127,418.72 and 31,628.78 is: 47,448.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,936.60 : 127,418.72 = 31,628.78 : x
  2. Step 2: Convert to fraction form
    84,936.60/127,418.72 = 31,628.78/x
  3. Step 3: Cross multiply
    84,936.60x = 127,418.72 × 31,628.78
  4. Step 4: Simplify right side
    84,936.60x = 4,030,097,867.52
  5. Step 5: Solve for x
    x = 4,030,097,867.52/84,936.60
  6. Step 6: Final answer
    x = 47,448.31

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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.