Home / 81,266.52-121,886.82-28,668.36

Finding the Fourth Proportional to 81,266.52, 121,886.82 and 28,668.36

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Solution

The fourth proportional to 81,266.52, 121,886.82 and 28,668.36 is: 42,997.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,266.52 : 121,886.82 = 28,668.36 : x
  2. Step 2: Convert to fraction form
    81,266.52/121,886.82 = 28,668.36/x
  3. Step 3: Cross multiply
    81,266.52x = 121,886.82 × 28,668.36
  4. Step 4: Simplify right side
    81,266.52x = 3,494,295,235.02
  5. Step 5: Solve for x
    x = 3,494,295,235.02/81,266.52
  6. Step 6: Final answer
    x = 42,997.97

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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.