Home / 129,013,131.38-178,033,086.32-78,861,313.94

Finding the Fourth Proportional to 129,013,131.38, 178,033,086.32 and 78,861,313.94

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Solution

The fourth proportional to 129,013,131.38, 178,033,086.32 and 78,861,313.94 is: 108,825,535.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,013,131.38 : 178,033,086.32 = 78,861,313.94 : x
  2. Step 2: Convert to fraction form
    129,013,131.38/178,033,086.32 = 78,861,313.94/x
  3. Step 3: Cross multiply
    129,013,131.38x = 178,033,086.32 × 78,861,313.94
  4. Step 4: Simplify right side
    129,013,131.38x = 14,039,923,110,704,168
  5. Step 5: Solve for x
    x = 14,039,923,110,704,168/129,013,131.38
  6. Step 6: Final answer
    x = 108,825,535.52

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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.