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Finding the Fourth Proportional to 384,382.06, 576,379.52 and 128,123.88

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Solution

The fourth proportional to 384,382.06, 576,379.52 and 128,123.88 is: 192,121.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,382.06 : 576,379.52 = 128,123.88 : x
  2. Step 2: Convert to fraction form
    384,382.06/576,379.52 = 128,123.88/x
  3. Step 3: Cross multiply
    384,382.06x = 576,379.52 × 128,123.88
  4. Step 4: Simplify right side
    384,382.06x = 73,847,980,454.94
  5. Step 5: Solve for x
    x = 73,847,980,454.94/384,382.06
  6. Step 6: Final answer
    x = 192,121.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.