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Finding the Fourth Proportional to 225,858.51, 311,683.90 and 139,800.35

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Solution

The fourth proportional to 225,858.51, 311,683.90 and 139,800.35 is: 192,923.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,858.51 : 311,683.90 = 139,800.35 : x
  2. Step 2: Convert to fraction form
    225,858.51/311,683.90 = 139,800.35/x
  3. Step 3: Cross multiply
    225,858.51x = 311,683.90 × 139,800.35
  4. Step 4: Simplify right side
    225,858.51x = 43,573,518,309.37
  5. Step 5: Solve for x
    x = 43,573,518,309.37/225,858.51
  6. Step 6: Final answer
    x = 192,923.96

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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.