Home / 100,426.30-138,583.64-55,103.14

Finding the Fourth Proportional to 100,426.30, 138,583.64 and 55,103.14

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Solution

The fourth proportional to 100,426.30, 138,583.64 and 55,103.14 is: 76,039.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,426.30 : 138,583.64 = 55,103.14 : x
  2. Step 2: Convert to fraction form
    100,426.30/138,583.64 = 55,103.14/x
  3. Step 3: Cross multiply
    100,426.30x = 138,583.64 × 55,103.14
  4. Step 4: Simplify right side
    100,426.30x = 7,636,393,716.63
  5. Step 5: Solve for x
    x = 7,636,393,716.63/100,426.30
  6. Step 6: Final answer
    x = 76,039.78

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1.5x scale

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.