Home / 78,367.20-117,559.02-25,780.80

Finding the Fourth Proportional to 78,367.20, 117,559.02 and 25,780.80

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Solution

The fourth proportional to 78,367.20, 117,559.02 and 25,780.80 is: 38,673.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,367.20 : 117,559.02 = 25,780.80 : x
  2. Step 2: Convert to fraction form
    78,367.20/117,559.02 = 25,780.80/x
  3. Step 3: Cross multiply
    78,367.20x = 117,559.02 × 25,780.80
  4. Step 4: Simplify right side
    78,367.20x = 3,030,765,582.82
  5. Step 5: Solve for x
    x = 3,030,765,582.82/78,367.20
  6. Step 6: Final answer
    x = 38,673.90

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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.