Home / 129,442.40-194,163.60-76,824.80

Finding the Fourth Proportional to 129,442.40, 194,163.60 and 76,824.80

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Solution

The fourth proportional to 129,442.40, 194,163.60 and 76,824.80 is: 115,237.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,442.40 : 194,163.60 = 76,824.80 : x
  2. Step 2: Convert to fraction form
    129,442.40/194,163.60 = 76,824.80/x
  3. Step 3: Cross multiply
    129,442.40x = 194,163.60 × 76,824.80
  4. Step 4: Simplify right side
    129,442.40x = 14,916,579,737.28
  5. Step 5: Solve for x
    x = 14,916,579,737.28/129,442.40
  6. Step 6: Final answer
    x = 115,237.20

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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.