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Finding the Fourth Proportional to 121,144.40, 181,716.60 and 68,656.40

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Solution

The fourth proportional to 121,144.40, 181,716.60 and 68,656.40 is: 102,984.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,144.40 : 181,716.60 = 68,656.40 : x
  2. Step 2: Convert to fraction form
    121,144.40/181,716.60 = 68,656.40/x
  3. Step 3: Cross multiply
    121,144.40x = 181,716.60 × 68,656.40
  4. Step 4: Simplify right side
    121,144.40x = 12,476,007,576.24
  5. Step 5: Solve for x
    x = 12,476,007,576.24/121,144.40
  6. Step 6: Final answer
    x = 102,984.60

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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.