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Finding the Fourth Proportional to 129,814.52, 194,652.12 and 66,608.60

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Solution

The fourth proportional to 129,814.52, 194,652.12 and 66,608.60 is: 99,877.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,814.52 : 194,652.12 = 66,608.60 : x
  2. Step 2: Convert to fraction form
    129,814.52/194,652.12 = 66,608.60/x
  3. Step 3: Cross multiply
    129,814.52x = 194,652.12 × 66,608.60
  4. Step 4: Simplify right side
    129,814.52x = 12,965,505,200.23
  5. Step 5: Solve for x
    x = 12,965,505,200.23/129,814.52
  6. Step 6: Final answer
    x = 99,877.16

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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.