Home / 100,535.04-138,738.53-55,215.95

Finding the Fourth Proportional to 100,535.04, 138,738.53 and 55,215.95

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Solution

The fourth proportional to 100,535.04, 138,738.53 and 55,215.95 is: 76,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,535.04 : 138,738.53 = 55,215.95 : x
  2. Step 2: Convert to fraction form
    100,535.04/138,738.53 = 55,215.95/x
  3. Step 3: Cross multiply
    100,535.04x = 138,738.53 × 55,215.95
  4. Step 4: Simplify right side
    100,535.04x = 7,660,578,765.78
  5. Step 5: Solve for x
    x = 7,660,578,765.78/100,535.04
  6. Step 6: Final answer
    x = 76,198.10

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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.