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Finding the Fourth Proportional to 140,542.67, 210,476.19 and 80,388.77

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Solution

The fourth proportional to 140,542.67, 210,476.19 and 80,388.77 is: 120,389.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,542.67 : 210,476.19 = 80,388.77 : x
  2. Step 2: Convert to fraction form
    140,542.67/210,476.19 = 80,388.77/x
  3. Step 3: Cross multiply
    140,542.67x = 210,476.19 × 80,388.77
  4. Step 4: Simplify right side
    140,542.67x = 16,919,920,976.01
  5. Step 5: Solve for x
    x = 16,919,920,976.01/140,542.67
  6. Step 6: Final answer
    x = 120,389.93

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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.