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Finding the Fourth Proportional to 279,935,999.40, 419,903,999.10 and 126,880,991.40

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Solution

The fourth proportional to 279,935,999.40, 419,903,999.10 and 126,880,991.40 is: 190,321,487.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,935,999.40 : 419,903,999.10 = 126,880,991.40 : x
  2. Step 2: Convert to fraction form
    279,935,999.40/419,903,999.10 = 126,880,991.40/x
  3. Step 3: Cross multiply
    279,935,999.40x = 419,903,999.10 × 126,880,991.40
  4. Step 4: Simplify right side
    279,935,999.40x = 53,277,835,698,632,712
  5. Step 5: Solve for x
    x = 53,277,835,698,632,712/279,935,999.40
  6. Step 6: Final answer
    x = 190,321,487.10

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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.