Home / 100,518.15-138,716.92-55,200.75

Finding the Fourth Proportional to 100,518.15, 138,716.92 and 55,200.75

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Solution

The fourth proportional to 100,518.15, 138,716.92 and 55,200.75 is: 76,178.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,518.15 : 138,716.92 = 55,200.75 : x
  2. Step 2: Convert to fraction form
    100,518.15/138,716.92 = 55,200.75/x
  3. Step 3: Cross multiply
    100,518.15x = 138,716.92 × 55,200.75
  4. Step 4: Simplify right side
    100,518.15x = 7,657,278,021.69
  5. Step 5: Solve for x
    x = 7,657,278,021.69/100,518.15
  6. Step 6: Final answer
    x = 76,178.06

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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.