Home / 129,679.47-194,519.21-100,140.39

Finding the Fourth Proportional to 129,679.47, 194,519.21 and 100,140.39

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Solution

The fourth proportional to 129,679.47, 194,519.21 and 100,140.39 is: 150,210.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,679.47 : 194,519.21 = 100,140.39 : x
  2. Step 2: Convert to fraction form
    129,679.47/194,519.21 = 100,140.39/x
  3. Step 3: Cross multiply
    129,679.47x = 194,519.21 × 100,140.39
  4. Step 4: Simplify right side
    129,679.47x = 19,479,229,051.19
  5. Step 5: Solve for x
    x = 19,479,229,051.19/129,679.47
  6. Step 6: Final answer
    x = 150,210.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.