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Finding the Fourth Proportional to 129,872.10, 194,808.15 and 103,628.10

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Solution

The fourth proportional to 129,872.10, 194,808.15 and 103,628.10 is: 155,442.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,872.10 : 194,808.15 = 103,628.10 : x
  2. Step 2: Convert to fraction form
    129,872.10/194,808.15 = 103,628.10/x
  3. Step 3: Cross multiply
    129,872.10x = 194,808.15 × 103,628.10
  4. Step 4: Simplify right side
    129,872.10x = 20,187,598,449.02
  5. Step 5: Solve for x
    x = 20,187,598,449.02/129,872.10
  6. Step 6: Final answer
    x = 155,442.15

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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.