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Finding the Fourth Proportional to 225,515.64, 311,135.76 and 130,020.24

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Solution

The fourth proportional to 225,515.64, 311,135.76 and 130,020.24 is: 179,384.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,515.64 : 311,135.76 = 130,020.24 : x
  2. Step 2: Convert to fraction form
    225,515.64/311,135.76 = 130,020.24/x
  3. Step 3: Cross multiply
    225,515.64x = 311,135.76 × 130,020.24
  4. Step 4: Simplify right side
    225,515.64x = 40,453,946,187.78
  5. Step 5: Solve for x
    x = 40,453,946,187.78/225,515.64
  6. Step 6: Final answer
    x = 179,384.22

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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.