Home / 100,904.30-139,249.09-55,581.36

Finding the Fourth Proportional to 100,904.30, 139,249.09 and 55,581.36

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Solution

The fourth proportional to 100,904.30, 139,249.09 and 55,581.36 is: 76,702.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,904.30 : 139,249.09 = 55,581.36 : x
  2. Step 2: Convert to fraction form
    100,904.30/139,249.09 = 55,581.36/x
  3. Step 3: Cross multiply
    100,904.30x = 139,249.09 × 55,581.36
  4. Step 4: Simplify right side
    100,904.30x = 7,739,653,348.26
  5. Step 5: Solve for x
    x = 7,739,653,348.26/100,904.30
  6. Step 6: Final answer
    x = 76,702.91

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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.