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Finding the Fourth Proportional to 140,363.70, 210,611.96 and 72,859.86

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Solution

The fourth proportional to 140,363.70, 210,611.96 and 72,859.86 is: 109,324.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,363.70 : 210,611.96 = 72,859.86 : x
  2. Step 2: Convert to fraction form
    140,363.70/210,611.96 = 72,859.86/x
  3. Step 3: Cross multiply
    140,363.70x = 210,611.96 × 72,859.86
  4. Step 4: Simplify right side
    140,363.70x = 15,345,157,555.63
  5. Step 5: Solve for x
    x = 15,345,157,555.63/140,363.70
  6. Step 6: Final answer
    x = 109,324.26

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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.