Home / 129,178.80-178,245.20-71,816.52

Finding the Fourth Proportional to 129,178.80, 178,245.20 and 71,816.52

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Solution

The fourth proportional to 129,178.80, 178,245.20 and 71,816.52 is: 99,094.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,178.80 : 178,245.20 = 71,816.52 : x
  2. Step 2: Convert to fraction form
    129,178.80/178,245.20 = 71,816.52/x
  3. Step 3: Cross multiply
    129,178.80x = 178,245.20 × 71,816.52
  4. Step 4: Simplify right side
    129,178.80x = 12,800,949,611.62
  5. Step 5: Solve for x
    x = 12,800,949,611.62/129,178.80
  6. Step 6: Final answer
    x = 99,094.82

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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.