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Finding the Fourth Proportional to 214,624,957.80, 321,954,932.70 and 91,804,204.20

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Solution

The fourth proportional to 214,624,957.80, 321,954,932.70 and 91,804,204.20 is: 137,713,790.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,624,957.80 : 321,954,932.70 = 91,804,204.20 : x
  2. Step 2: Convert to fraction form
    214,624,957.80/321,954,932.70 = 91,804,204.20/x
  3. Step 3: Cross multiply
    214,624,957.80x = 321,954,932.70 × 91,804,204.20
  4. Step 4: Simplify right side
    214,624,957.80x = 29,556,816,384,788,056
  5. Step 5: Solve for x
    x = 29,556,816,384,788,056/214,624,957.80
  6. Step 6: Final answer
    x = 137,713,790.08

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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.