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Finding the Fourth Proportional to 121,768.88, 182,358.06 and 84,223.58

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Solution

The fourth proportional to 121,768.88, 182,358.06 and 84,223.58 is: 126,131.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,768.88 : 182,358.06 = 84,223.58 : x
  2. Step 2: Convert to fraction form
    121,768.88/182,358.06 = 84,223.58/x
  3. Step 3: Cross multiply
    121,768.88x = 182,358.06 × 84,223.58
  4. Step 4: Simplify right side
    121,768.88x = 15,358,848,655.05
  5. Step 5: Solve for x
    x = 15,358,848,655.05/121,768.88
  6. Step 6: Final answer
    x = 126,131.15

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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.