Home / 72,705.45-100,399.70-54,769.31

Finding the Fourth Proportional to 72,705.45, 100,399.70 and 54,769.31

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Solution

The fourth proportional to 72,705.45, 100,399.70 and 54,769.31 is: 75,631.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,705.45 : 100,399.70 = 54,769.31 : x
  2. Step 2: Convert to fraction form
    72,705.45/100,399.70 = 54,769.31/x
  3. Step 3: Cross multiply
    72,705.45x = 100,399.70 × 54,769.31
  4. Step 4: Simplify right side
    72,705.45x = 5,498,822,869.38
  5. Step 5: Solve for x
    x = 5,498,822,869.38/72,705.45
  6. Step 6: Final answer
    x = 75,631.51

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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.