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Finding the Fourth Proportional to 225,295.81, 310,906.68 and 129,800.45

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Solution

The fourth proportional to 225,295.81, 310,906.68 and 129,800.45 is: 179,123.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,295.81 : 310,906.68 = 129,800.45 : x
  2. Step 2: Convert to fraction form
    225,295.81/310,906.68 = 129,800.45/x
  3. Step 3: Cross multiply
    225,295.81x = 310,906.68 × 129,800.45
  4. Step 4: Simplify right side
    225,295.81x = 40,355,826,972.01
  5. Step 5: Solve for x
    x = 40,355,826,972.01/225,295.81
  6. Step 6: Final answer
    x = 179,123.74

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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.