Home / 123,840,489-170,759,467.24-79,127,388.32

Finding the Fourth Proportional to 123,840,489, 170,759,467.24 and 79,127,388.32

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Solution

The fourth proportional to 123,840,489, 170,759,467.24 and 79,127,388.32 is: 109,106,083.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,840,489 : 170,759,467.24 = 79,127,388.32 : x
  2. Step 2: Convert to fraction form
    123,840,489/170,759,467.24 = 79,127,388.32/x
  3. Step 3: Cross multiply
    123,840,489x = 170,759,467.24 × 79,127,388.32
  4. Step 4: Simplify right side
    123,840,489x = 13,511,750,673,615,798
  5. Step 5: Solve for x
    x = 13,511,750,673,615,798/123,840,489
  6. Step 6: Final answer
    x = 109,106,083.02

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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.