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Finding the Fourth Proportional to 129,424.22, 193,873.89 and 66,963.50

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Solution

The fourth proportional to 129,424.22, 193,873.89 and 66,963.50 is: 100,309.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,424.22 : 193,873.89 = 66,963.50 : x
  2. Step 2: Convert to fraction form
    129,424.22/193,873.89 = 66,963.50/x
  3. Step 3: Cross multiply
    129,424.22x = 193,873.89 × 66,963.50
  4. Step 4: Simplify right side
    129,424.22x = 12,982,474,233.02
  5. Step 5: Solve for x
    x = 12,982,474,233.02/129,424.22
  6. Step 6: Final answer
    x = 100,309.46

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1.5x scale

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.