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Finding the Fourth Proportional to 121,912.68, 182,881.32 and 45,992.17

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Solution

The fourth proportional to 121,912.68, 182,881.32 and 45,992.17 is: 68,992.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,912.68 : 182,881.32 = 45,992.17 : x
  2. Step 2: Convert to fraction form
    121,912.68/182,881.32 = 45,992.17/x
  3. Step 3: Cross multiply
    121,912.68x = 182,881.32 × 45,992.17
  4. Step 4: Simplify right side
    121,912.68x = 8,411,109,074.10
  5. Step 5: Solve for x
    x = 8,411,109,074.10/121,912.68
  6. Step 6: Final answer
    x = 68,992.90

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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.