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Finding the Fourth Proportional to 273,943,010.97, 411,055,791.29 and 128,391,359.40

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Solution

The fourth proportional to 273,943,010.97, 411,055,791.29 and 128,391,359.40 is: 192,653,251.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,943,010.97 : 411,055,791.29 = 128,391,359.40 : x
  2. Step 2: Convert to fraction form
    273,943,010.97/411,055,791.29 = 128,391,359.40/x
  3. Step 3: Cross multiply
    273,943,010.97x = 411,055,791.29 × 128,391,359.40
  4. Step 4: Simplify right side
    273,943,010.97x = 52,776,011,832,965,784
  5. Step 5: Solve for x
    x = 52,776,011,832,965,784/273,943,010.97
  6. Step 6: Final answer
    x = 192,653,251.66

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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.