Home / 129,681.47-194,522.21-100,142.39

Finding the Fourth Proportional to 129,681.47, 194,522.21 and 100,142.39

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Solution

The fourth proportional to 129,681.47, 194,522.21 and 100,142.39 is: 150,213.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,681.47 : 194,522.21 = 100,142.39 : x
  2. Step 2: Convert to fraction form
    129,681.47/194,522.21 = 100,142.39/x
  3. Step 3: Cross multiply
    129,681.47x = 194,522.21 × 100,142.39
  4. Step 4: Simplify right side
    129,681.47x = 19,479,919,017.48
  5. Step 5: Solve for x
    x = 19,479,919,017.48/129,681.47
  6. Step 6: Final answer
    x = 150,213.59

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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.