Home / 140,550.10-210,861.15-81,279.70

Finding the Fourth Proportional to 140,550.10, 210,861.15 and 81,279.70

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Solution

The fourth proportional to 140,550.10, 210,861.15 and 81,279.70 is: 121,940.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,550.10 : 210,861.15 = 81,279.70 : x
  2. Step 2: Convert to fraction form
    140,550.10/210,861.15 = 81,279.70/x
  3. Step 3: Cross multiply
    140,550.10x = 210,861.15 × 81,279.70
  4. Step 4: Simplify right side
    140,550.10x = 17,138,731,013.66
  5. Step 5: Solve for x
    x = 17,138,731,013.66/140,550.10
  6. Step 6: Final answer
    x = 121,940.37

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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.