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Finding the Fourth Proportional to 129,208.96, 193,895.52 and 66,879.46

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Solution

The fourth proportional to 129,208.96, 193,895.52 and 66,879.46 is: 100,361.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,208.96 : 193,895.52 = 66,879.46 : x
  2. Step 2: Convert to fraction form
    129,208.96/193,895.52 = 66,879.46/x
  3. Step 3: Cross multiply
    129,208.96x = 193,895.52 × 66,879.46
  4. Step 4: Simplify right side
    129,208.96x = 12,967,627,674.02
  5. Step 5: Solve for x
    x = 12,967,627,674.02/129,208.96
  6. Step 6: Final answer
    x = 100,361.68

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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.