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Finding the Fourth Proportional to 211,131.66, 316,700.22 and 68,975.84

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Solution

The fourth proportional to 211,131.66, 316,700.22 and 68,975.84 is: 103,464.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,131.66 : 316,700.22 = 68,975.84 : x
  2. Step 2: Convert to fraction form
    211,131.66/316,700.22 = 68,975.84/x
  3. Step 3: Cross multiply
    211,131.66x = 316,700.22 × 68,975.84
  4. Step 4: Simplify right side
    211,131.66x = 21,844,663,702.68
  5. Step 5: Solve for x
    x = 21,844,663,702.68/211,131.66
  6. Step 6: Final answer
    x = 103,464.65

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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.