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Finding the Fourth Proportional to 81,103.75, 111,923.40 and 45,295.11

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Solution

The fourth proportional to 81,103.75, 111,923.40 and 45,295.11 is: 62,507.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,103.75 : 111,923.40 = 45,295.11 : x
  2. Step 2: Convert to fraction form
    81,103.75/111,923.40 = 45,295.11/x
  3. Step 3: Cross multiply
    81,103.75x = 111,923.40 × 45,295.11
  4. Step 4: Simplify right side
    81,103.75x = 5,069,582,884.43
  5. Step 5: Solve for x
    x = 5,069,582,884.43/81,103.75
  6. Step 6: Final answer
    x = 62,507.38

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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.