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Finding the Fourth Proportional to 140,908.69, 211,310.52 and 56,640.45

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Solution

The fourth proportional to 140,908.69, 211,310.52 and 56,640.45 is: 84,939.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,908.69 : 211,310.52 = 56,640.45 : x
  2. Step 2: Convert to fraction form
    140,908.69/211,310.52 = 56,640.45/x
  3. Step 3: Cross multiply
    140,908.69x = 211,310.52 × 56,640.45
  4. Step 4: Simplify right side
    140,908.69x = 11,968,722,942.53
  5. Step 5: Solve for x
    x = 11,968,722,942.53/140,908.69
  6. Step 6: Final answer
    x = 84,939.57

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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.