Home / 129,004.42-178,025.97-72,415.90

Finding the Fourth Proportional to 129,004.42, 178,025.97 and 72,415.90

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Solution

The fourth proportional to 129,004.42, 178,025.97 and 72,415.90 is: 99,933.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,004.42 : 178,025.97 = 72,415.90 : x
  2. Step 2: Convert to fraction form
    129,004.42/178,025.97 = 72,415.90/x
  3. Step 3: Cross multiply
    129,004.42x = 178,025.97 × 72,415.90
  4. Step 4: Simplify right side
    129,004.42x = 12,891,910,840.92
  5. Step 5: Solve for x
    x = 12,891,910,840.92/129,004.42
  6. Step 6: Final answer
    x = 99,933.87

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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.