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Finding the Fourth Proportional to 129,992.64, 194,995.92 and 36,505.68

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Solution

The fourth proportional to 129,992.64, 194,995.92 and 36,505.68 is: 54,760.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,992.64 : 194,995.92 = 36,505.68 : x
  2. Step 2: Convert to fraction form
    129,992.64/194,995.92 = 36,505.68/x
  3. Step 3: Cross multiply
    129,992.64x = 194,995.92 × 36,505.68
  4. Step 4: Simplify right side
    129,992.64x = 7,118,458,656.83
  5. Step 5: Solve for x
    x = 7,118,458,656.83/129,992.64
  6. Step 6: Final answer
    x = 54,760.47

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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.