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Finding the Fourth Proportional to 20,719,770.60, 31,079,655.90 and 19,544,039.40

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Solution

The fourth proportional to 20,719,770.60, 31,079,655.90 and 19,544,039.40 is: 29,316,059.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719,770.60 : 31,079,655.90 = 19,544,039.40 : x
  2. Step 2: Convert to fraction form
    20,719,770.60/31,079,655.90 = 19,544,039.40/x
  3. Step 3: Cross multiply
    20,719,770.60x = 31,079,655.90 × 19,544,039.40
  4. Step 4: Simplify right side
    20,719,770.60x = 607,422,019,448,042.38
  5. Step 5: Solve for x
    x = 607,422,019,448,042.38/20,719,770.60
  6. Step 6: Final answer
    x = 29,316,059.10

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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.