Home / 81,120.60-111,945.24-45,311.10

Finding the Fourth Proportional to 81,120.60, 111,945.24 and 45,311.10

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Solution

The fourth proportional to 81,120.60, 111,945.24 and 45,311.10 is: 62,528.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,120.60 : 111,945.24 = 45,311.10 : x
  2. Step 2: Convert to fraction form
    81,120.60/111,945.24 = 45,311.10/x
  3. Step 3: Cross multiply
    81,120.60x = 111,945.24 × 45,311.10
  4. Step 4: Simplify right side
    81,120.60x = 5,072,361,964.16
  5. Step 5: Solve for x
    x = 5,072,361,964.16/81,120.60
  6. Step 6: Final answer
    x = 62,528.65

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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.