Home / 81,197,414.40-121,796,121.60-20,613,140.40

Finding the Fourth Proportional to 81,197,414.40, 121,796,121.60 and 20,613,140.40

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Solution

The fourth proportional to 81,197,414.40, 121,796,121.60 and 20,613,140.40 is: 30,919,710.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,197,414.40 : 121,796,121.60 = 20,613,140.40 : x
  2. Step 2: Convert to fraction form
    81,197,414.40/121,796,121.60 = 20,613,140.40/x
  3. Step 3: Cross multiply
    81,197,414.40x = 121,796,121.60 × 20,613,140.40
  4. Step 4: Simplify right side
    81,197,414.40x = 2,510,600,554,716,272.50
  5. Step 5: Solve for x
    x = 2,510,600,554,716,272.50/81,197,414.40
  6. Step 6: Final answer
    x = 30,919,710.60

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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.