Home / 78,067.06-117,116.79-31,323.58

Finding the Fourth Proportional to 78,067.06, 117,116.79 and 31,323.58

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Solution

The fourth proportional to 78,067.06, 117,116.79 and 31,323.58 is: 46,991.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,067.06 : 117,116.79 = 31,323.58 : x
  2. Step 2: Convert to fraction form
    78,067.06/117,116.79 = 31,323.58/x
  3. Step 3: Cross multiply
    78,067.06x = 117,116.79 × 31,323.58
  4. Step 4: Simplify right side
    78,067.06x = 3,668,517,140.91
  5. Step 5: Solve for x
    x = 3,668,517,140.91/78,067.06
  6. Step 6: Final answer
    x = 46,991.87

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1.5x scale

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.