Home / 78,378.99-108,194.03-54,519.51

Finding the Fourth Proportional to 78,378.99, 108,194.03 and 54,519.51

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Solution

The fourth proportional to 78,378.99, 108,194.03 and 54,519.51 is: 75,258.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,378.99 : 108,194.03 = 54,519.51 : x
  2. Step 2: Convert to fraction form
    78,378.99/108,194.03 = 54,519.51/x
  3. Step 3: Cross multiply
    78,378.99x = 108,194.03 × 54,519.51
  4. Step 4: Simplify right side
    78,378.99x = 5,898,685,227.93
  5. Step 5: Solve for x
    x = 5,898,685,227.93/78,378.99
  6. Step 6: Final answer
    x = 75,258.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.