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Finding the Fourth Proportional to 207,631,318.80, 311,446,978.20 and 54,292,875.60

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Solution

The fourth proportional to 207,631,318.80, 311,446,978.20 and 54,292,875.60 is: 81,439,313.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,631,318.80 : 311,446,978.20 = 54,292,875.60 : x
  2. Step 2: Convert to fraction form
    207,631,318.80/311,446,978.20 = 54,292,875.60/x
  3. Step 3: Cross multiply
    207,631,318.80x = 311,446,978.20 × 54,292,875.60
  4. Step 4: Simplify right side
    207,631,318.80x = 16,909,352,043,408,512
  5. Step 5: Solve for x
    x = 16,909,352,043,408,512/207,631,318.80
  6. Step 6: Final answer
    x = 81,439,313.40

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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.