Home / 81,320.28-121,955.52-28,717.44

Finding the Fourth Proportional to 81,320.28, 121,955.52 and 28,717.44

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Solution

The fourth proportional to 81,320.28, 121,955.52 and 28,717.44 is: 43,067.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,320.28 : 121,955.52 = 28,717.44 : x
  2. Step 2: Convert to fraction form
    81,320.28/121,955.52 = 28,717.44/x
  3. Step 3: Cross multiply
    81,320.28x = 121,955.52 × 28,717.44
  4. Step 4: Simplify right side
    81,320.28x = 3,502,250,328.27
  5. Step 5: Solve for x
    x = 3,502,250,328.27/81,320.28
  6. Step 6: Final answer
    x = 43,067.37

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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.