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Finding the Fourth Proportional to 121,429.80, 182,144.70 and 68,941.80

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Solution

The fourth proportional to 121,429.80, 182,144.70 and 68,941.80 is: 103,412.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,429.80 : 182,144.70 = 68,941.80 : x
  2. Step 2: Convert to fraction form
    121,429.80/182,144.70 = 68,941.80/x
  3. Step 3: Cross multiply
    121,429.80x = 182,144.70 × 68,941.80
  4. Step 4: Simplify right side
    121,429.80x = 12,557,383,478.46
  5. Step 5: Solve for x
    x = 12,557,383,478.46/121,429.80
  6. Step 6: Final answer
    x = 103,412.70

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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.