Home / 129,426.26-178,578.69-72,816.98

Finding the Fourth Proportional to 129,426.26, 178,578.69 and 72,816.98

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Solution

The fourth proportional to 129,426.26, 178,578.69 and 72,816.98 is: 100,470.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,426.26 : 178,578.69 = 72,816.98 : x
  2. Step 2: Convert to fraction form
    129,426.26/178,578.69 = 72,816.98/x
  3. Step 3: Cross multiply
    129,426.26x = 178,578.69 × 72,816.98
  4. Step 4: Simplify right side
    129,426.26x = 13,003,560,898.16
  5. Step 5: Solve for x
    x = 13,003,560,898.16/129,426.26
  6. Step 6: Final answer
    x = 100,470.81

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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.