Home / 123,202,928-169,992,859.42-72,942,189.79

Finding the Fourth Proportional to 123,202,928, 169,992,859.42 and 72,942,189.79

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Solution

The fourth proportional to 123,202,928, 169,992,859.42 and 72,942,189.79 is: 100,644,129.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,202,928 : 169,992,859.42 = 72,942,189.79 : x
  2. Step 2: Convert to fraction form
    123,202,928/169,992,859.42 = 72,942,189.79/x
  3. Step 3: Cross multiply
    123,202,928x = 169,992,859.42 × 72,942,189.79
  4. Step 4: Simplify right side
    123,202,928x = 12,399,651,414,758,430
  5. Step 5: Solve for x
    x = 12,399,651,414,758,430/123,202,928
  6. Step 6: Final answer
    x = 100,644,129.29

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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.