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Finding the Fourth Proportional to 81,149.97, 111,987.53 and 45,341.49

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Solution

The fourth proportional to 81,149.97, 111,987.53 and 45,341.49 is: 62,571.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,149.97 : 111,987.53 = 45,341.49 : x
  2. Step 2: Convert to fraction form
    81,149.97/111,987.53 = 45,341.49/x
  3. Step 3: Cross multiply
    81,149.97x = 111,987.53 × 45,341.49
  4. Step 4: Simplify right side
    81,149.97x = 5,077,681,471.62
  5. Step 5: Solve for x
    x = 5,077,681,471.62/81,149.97
  6. Step 6: Final answer
    x = 62,571.58

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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.