Home / 100,558.26-138,763.53-55,238.15

Finding the Fourth Proportional to 100,558.26, 138,763.53 and 55,238.15

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Solution

The fourth proportional to 100,558.26, 138,763.53 and 55,238.15 is: 76,224.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,558.26 : 138,763.53 = 55,238.15 : x
  2. Step 2: Convert to fraction form
    100,558.26/138,763.53 = 55,238.15/x
  3. Step 3: Cross multiply
    100,558.26x = 138,763.53 × 55,238.15
  4. Step 4: Simplify right side
    100,558.26x = 7,665,041,031.58
  5. Step 5: Solve for x
    x = 7,665,041,031.58/100,558.26
  6. Step 6: Final answer
    x = 76,224.88

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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.