Home / 129,576.46-178,811.49-72,986.62

Finding the Fourth Proportional to 129,576.46, 178,811.49 and 72,986.62

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Solution

The fourth proportional to 129,576.46, 178,811.49 and 72,986.62 is: 100,719.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,576.46 : 178,811.49 = 72,986.62 : x
  2. Step 2: Convert to fraction form
    129,576.46/178,811.49 = 72,986.62/x
  3. Step 3: Cross multiply
    129,576.46x = 178,811.49 × 72,986.62
  4. Step 4: Simplify right side
    129,576.46x = 13,050,846,098.93
  5. Step 5: Solve for x
    x = 13,050,846,098.93/129,576.46
  6. Step 6: Final answer
    x = 100,719.27

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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.