Home / 100,215.85-138,297.70-54,895.75

Finding the Fourth Proportional to 100,215.85, 138,297.70 and 54,895.75

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Solution

The fourth proportional to 100,215.85, 138,297.70 and 54,895.75 is: 75,756.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,215.85 : 138,297.70 = 54,895.75 : x
  2. Step 2: Convert to fraction form
    100,215.85/138,297.70 = 54,895.75/x
  3. Step 3: Cross multiply
    100,215.85x = 138,297.70 × 54,895.75
  4. Step 4: Simplify right side
    100,215.85x = 7,591,955,964.78
  5. Step 5: Solve for x
    x = 7,591,955,964.78/100,215.85
  6. Step 6: Final answer
    x = 75,756.04

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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.