Home / 305,216,997.12-421,195,455.80-165,984,791.40

Finding the Fourth Proportional to 305,216,997.12, 421,195,455.80 and 165,984,791.40

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Solution

The fourth proportional to 305,216,997.12, 421,195,455.80 and 165,984,791.40 is: 229,056,836.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,216,997.12 : 421,195,455.80 = 165,984,791.40 : x
  2. Step 2: Convert to fraction form
    305,216,997.12/421,195,455.80 = 165,984,791.40/x
  3. Step 3: Cross multiply
    305,216,997.12x = 421,195,455.80 × 165,984,791.40
  4. Step 4: Simplify right side
    305,216,997.12x = 69,912,039,869,590,928
  5. Step 5: Solve for x
    x = 69,912,039,869,590,928/305,216,997.12
  6. Step 6: Final answer
    x = 229,056,836.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.