Home / 129,576.27-178,811.24-72,986.43

Finding the Fourth Proportional to 129,576.27, 178,811.24 and 72,986.43

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Solution

The fourth proportional to 129,576.27, 178,811.24 and 72,986.43 is: 100,719.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,576.27 : 178,811.24 = 72,986.43 : x
  2. Step 2: Convert to fraction form
    129,576.27/178,811.24 = 72,986.43/x
  3. Step 3: Cross multiply
    129,576.27x = 178,811.24 × 72,986.43
  4. Step 4: Simplify right side
    129,576.27x = 13,050,793,686.54
  5. Step 5: Solve for x
    x = 13,050,793,686.54/129,576.27
  6. Step 6: Final answer
    x = 100,719.01

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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.