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Finding the Fourth Proportional to 81,133.78, 111,954.57 and 45,330.57

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Solution

The fourth proportional to 81,133.78, 111,954.57 and 45,330.57 is: 62,550.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,133.78 : 111,954.57 = 45,330.57 : x
  2. Step 2: Convert to fraction form
    81,133.78/111,954.57 = 45,330.57/x
  3. Step 3: Cross multiply
    81,133.78x = 111,954.57 × 45,330.57
  4. Step 4: Simplify right side
    81,133.78x = 5,074,963,912.43
  5. Step 5: Solve for x
    x = 5,074,963,912.43/81,133.78
  6. Step 6: Final answer
    x = 62,550.57

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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.