Home / 140,156.20-210,234.30-81,107.20

Finding the Fourth Proportional to 140,156.20, 210,234.30 and 81,107.20

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Solution

The fourth proportional to 140,156.20, 210,234.30 and 81,107.20 is: 121,660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,156.20 : 210,234.30 = 81,107.20 : x
  2. Step 2: Convert to fraction form
    140,156.20/210,234.30 = 81,107.20/x
  3. Step 3: Cross multiply
    140,156.20x = 210,234.30 × 81,107.20
  4. Step 4: Simplify right side
    140,156.20x = 17,051,515,416.96
  5. Step 5: Solve for x
    x = 17,051,515,416.96/140,156.20
  6. Step 6: Final answer
    x = 121,660.80

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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.