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Finding the Fourth Proportional to 129,892.91, 194,941.42 and 66,710.48

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Solution

The fourth proportional to 129,892.91, 194,941.42 and 66,710.48 is: 100,118.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,892.91 : 194,941.42 = 66,710.48 : x
  2. Step 2: Convert to fraction form
    129,892.91/194,941.42 = 66,710.48/x
  3. Step 3: Cross multiply
    129,892.91x = 194,941.42 × 66,710.48
  4. Step 4: Simplify right side
    129,892.91x = 13,004,634,558.60
  5. Step 5: Solve for x
    x = 13,004,634,558.60/129,892.91
  6. Step 6: Final answer
    x = 100,118.13

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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.