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Finding the Fourth Proportional to 121,299.84, 181,941.24 and 45,383.88

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Solution

The fourth proportional to 121,299.84, 181,941.24 and 45,383.88 is: 68,072.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,299.84 : 181,941.24 = 45,383.88 : x
  2. Step 2: Convert to fraction form
    121,299.84/181,941.24 = 45,383.88/x
  3. Step 3: Cross multiply
    121,299.84x = 181,941.24 × 45,383.88
  4. Step 4: Simplify right side
    121,299.84x = 8,257,199,403.21
  5. Step 5: Solve for x
    x = 8,257,199,403.21/121,299.84
  6. Step 6: Final answer
    x = 68,072.63

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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.