Home / 81,121.10-111,945.92-45,311.64

Finding the Fourth Proportional to 81,121.10, 111,945.92 and 45,311.64

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Solution

The fourth proportional to 81,121.10, 111,945.92 and 45,311.64 is: 62,529.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,121.10 : 111,945.92 = 45,311.64 : x
  2. Step 2: Convert to fraction form
    81,121.10/111,945.92 = 45,311.64/x
  3. Step 3: Cross multiply
    81,121.10x = 111,945.92 × 45,311.64
  4. Step 4: Simplify right side
    81,121.10x = 5,072,453,226.51
  5. Step 5: Solve for x
    x = 5,072,453,226.51/81,121.10
  6. Step 6: Final answer
    x = 62,529.39

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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.