Home / 80,860.40-121,290.60-72,112.40

Finding the Fourth Proportional to 80,860.40, 121,290.60 and 72,112.40

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Solution

The fourth proportional to 80,860.40, 121,290.60 and 72,112.40 is: 108,168.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,860.40 : 121,290.60 = 72,112.40 : x
  2. Step 2: Convert to fraction form
    80,860.40/121,290.60 = 72,112.40/x
  3. Step 3: Cross multiply
    80,860.40x = 121,290.60 × 72,112.40
  4. Step 4: Simplify right side
    80,860.40x = 8,746,556,263.44
  5. Step 5: Solve for x
    x = 8,746,556,263.44/80,860.40
  6. Step 6: Final answer
    x = 108,168.60

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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.