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Finding the Fourth Proportional to 140,685, 211,079.34 and 74,122.44

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Solution

The fourth proportional to 140,685, 211,079.34 and 74,122.44 is: 111,210.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,685 : 211,079.34 = 74,122.44 : x
  2. Step 2: Convert to fraction form
    140,685/211,079.34 = 74,122.44/x
  3. Step 3: Cross multiply
    140,685x = 211,079.34 × 74,122.44
  4. Step 4: Simplify right side
    140,685x = 15,645,715,714.39
  5. Step 5: Solve for x
    x = 15,645,715,714.39/140,685
  6. Step 6: Final answer
    x = 111,210.97

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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.