Home / 80,860.20-121,290.30-79,132.20

Finding the Fourth Proportional to 80,860.20, 121,290.30 and 79,132.20

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Solution

The fourth proportional to 80,860.20, 121,290.30 and 79,132.20 is: 118,698.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,860.20 : 121,290.30 = 79,132.20 : x
  2. Step 2: Convert to fraction form
    80,860.20/121,290.30 = 79,132.20/x
  3. Step 3: Cross multiply
    80,860.20x = 121,290.30 × 79,132.20
  4. Step 4: Simplify right side
    80,860.20x = 9,597,968,277.66
  5. Step 5: Solve for x
    x = 9,597,968,277.66/80,860.20
  6. Step 6: Final answer
    x = 118,698.30

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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.