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Finding the Fourth Proportional to 129,793.79, 194,689.80 and 69,850.47

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Solution

The fourth proportional to 129,793.79, 194,689.80 and 69,850.47 is: 104,775.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,793.79 : 194,689.80 = 69,850.47 : x
  2. Step 2: Convert to fraction form
    129,793.79/194,689.80 = 69,850.47/x
  3. Step 3: Cross multiply
    129,793.79x = 194,689.80 × 69,850.47
  4. Step 4: Simplify right side
    129,793.79x = 13,599,174,034.21
  5. Step 5: Solve for x
    x = 13,599,174,034.21/129,793.79
  6. Step 6: Final answer
    x = 104,775.23

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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.