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Finding the Fourth Proportional to 225,495.70, 311,189.09 and 128,697.63

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Solution

The fourth proportional to 225,495.70, 311,189.09 and 128,697.63 is: 177,605.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,495.70 : 311,189.09 = 128,697.63 : x
  2. Step 2: Convert to fraction form
    225,495.70/311,189.09 = 128,697.63/x
  3. Step 3: Cross multiply
    225,495.70x = 311,189.09 × 128,697.63
  4. Step 4: Simplify right side
    225,495.70x = 40,049,296,487.17
  5. Step 5: Solve for x
    x = 40,049,296,487.17/225,495.70
  6. Step 6: Final answer
    x = 177,605.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.