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Finding the Fourth Proportional to 225,496.40, 311,067.06 and 139,427.88

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Solution

The fourth proportional to 225,496.40, 311,067.06 and 139,427.88 is: 192,337.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,496.40 : 311,067.06 = 139,427.88 : x
  2. Step 2: Convert to fraction form
    225,496.40/311,067.06 = 139,427.88/x
  3. Step 3: Cross multiply
    225,496.40x = 311,067.06 × 139,427.88
  4. Step 4: Simplify right side
    225,496.40x = 43,371,420,713.63
  5. Step 5: Solve for x
    x = 43,371,420,713.63/225,496.40
  6. Step 6: Final answer
    x = 192,337.53

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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.