Home / 81,213.47-121,738.43-33,854.79

Finding the Fourth Proportional to 81,213.47, 121,738.43 and 33,854.79

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Solution

The fourth proportional to 81,213.47, 121,738.43 and 33,854.79 is: 50,748.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,213.47 : 121,738.43 = 33,854.79 : x
  2. Step 2: Convert to fraction form
    81,213.47/121,738.43 = 33,854.79/x
  3. Step 3: Cross multiply
    81,213.47x = 121,738.43 × 33,854.79
  4. Step 4: Simplify right side
    81,213.47x = 4,121,428,373.89
  5. Step 5: Solve for x
    x = 4,121,428,373.89/81,213.47
  6. Step 6: Final answer
    x = 50,748.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.