Home / 81,492,519.10-122,238,778.65-20,908,245.10

Finding the Fourth Proportional to 81,492,519.10, 122,238,778.65 and 20,908,245.10

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Solution

The fourth proportional to 81,492,519.10, 122,238,778.65 and 20,908,245.10 is: 31,362,367.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,492,519.10 : 122,238,778.65 = 20,908,245.10 : x
  2. Step 2: Convert to fraction form
    81,492,519.10/122,238,778.65 = 20,908,245.10/x
  3. Step 3: Cross multiply
    81,492,519.10x = 122,238,778.65 × 20,908,245.10
  4. Step 4: Simplify right side
    81,492,519.10x = 2,555,798,344,738,847.50
  5. Step 5: Solve for x
    x = 2,555,798,344,738,847.50/81,492,519.10
  6. Step 6: Final answer
    x = 31,362,367.65

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Similar ratio
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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.