Home / 100,956.09-139,317.54-55,638.27

Finding the Fourth Proportional to 100,956.09, 139,317.54 and 55,638.27

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Solution

The fourth proportional to 100,956.09, 139,317.54 and 55,638.27 is: 76,779.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,956.09 : 139,317.54 = 55,638.27 : x
  2. Step 2: Convert to fraction form
    100,956.09/139,317.54 = 55,638.27/x
  3. Step 3: Cross multiply
    100,956.09x = 139,317.54 × 55,638.27
  4. Step 4: Simplify right side
    100,956.09x = 7,751,386,906.26
  5. Step 5: Solve for x
    x = 7,751,386,906.26/100,956.09
  6. Step 6: Final answer
    x = 76,779.79

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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.