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Finding the Fourth Proportional to 212,873,187.60, 318,712,584.60 and 206,901,219.60

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Solution

The fourth proportional to 212,873,187.60, 318,712,584.60 and 206,901,219.60 is: 309,771,386.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,873,187.60 : 318,712,584.60 = 206,901,219.60 : x
  2. Step 2: Convert to fraction form
    212,873,187.60/318,712,584.60 = 206,901,219.60/x
  3. Step 3: Cross multiply
    212,873,187.60x = 318,712,584.60 × 206,901,219.60
  4. Step 4: Simplify right side
    212,873,187.60x = 65,942,022,455,608,184
  5. Step 5: Solve for x
    x = 65,942,022,455,608,184/212,873,187.60
  6. Step 6: Final answer
    x = 309,771,386.43

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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.