Home / 100,519.20-138,720.06-66,586.68

Finding the Fourth Proportional to 100,519.20, 138,720.06 and 66,586.68

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Solution

The fourth proportional to 100,519.20, 138,720.06 and 66,586.68 is: 91,891.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,519.20 : 138,720.06 = 66,586.68 : x
  2. Step 2: Convert to fraction form
    100,519.20/138,720.06 = 66,586.68/x
  3. Step 3: Cross multiply
    100,519.20x = 138,720.06 × 66,586.68
  4. Step 4: Simplify right side
    100,519.20x = 9,236,908,244.80
  5. Step 5: Solve for x
    x = 9,236,908,244.80/100,519.20
  6. Step 6: Final answer
    x = 91,891.98

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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.