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Finding the Fourth Proportional to 140,516.20, 210,774.30 and 81,467.20

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Solution

The fourth proportional to 140,516.20, 210,774.30 and 81,467.20 is: 122,200.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,516.20 : 210,774.30 = 81,467.20 : x
  2. Step 2: Convert to fraction form
    140,516.20/210,774.30 = 81,467.20/x
  3. Step 3: Cross multiply
    140,516.20x = 210,774.30 × 81,467.20
  4. Step 4: Simplify right side
    140,516.20x = 17,171,192,052.96
  5. Step 5: Solve for x
    x = 17,171,192,052.96/140,516.20
  6. Step 6: Final answer
    x = 122,200.80

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1.5x scale

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.