Home / 80,860.30-121,290.45-72,306.70

Finding the Fourth Proportional to 80,860.30, 121,290.45 and 72,306.70

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Solution

The fourth proportional to 80,860.30, 121,290.45 and 72,306.70 is: 108,460.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,860.30 : 121,290.45 = 72,306.70 : x
  2. Step 2: Convert to fraction form
    80,860.30/121,290.45 = 72,306.70/x
  3. Step 3: Cross multiply
    80,860.30x = 121,290.45 × 72,306.70
  4. Step 4: Simplify right side
    80,860.30x = 8,770,112,181.02
  5. Step 5: Solve for x
    x = 8,770,112,181.02/80,860.30
  6. Step 6: Final answer
    x = 108,460.05

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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.