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Finding the Fourth Proportional to 129,690.10, 194,207.10 and 103,446.10

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Solution

The fourth proportional to 129,690.10, 194,207.10 and 103,446.10 is: 154,907.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,690.10 : 194,207.10 = 103,446.10 : x
  2. Step 2: Convert to fraction form
    129,690.10/194,207.10 = 103,446.10/x
  3. Step 3: Cross multiply
    129,690.10x = 194,207.10 × 103,446.10
  4. Step 4: Simplify right side
    129,690.10x = 20,089,967,087.31
  5. Step 5: Solve for x
    x = 20,089,967,087.31/129,690.10
  6. Step 6: Final answer
    x = 154,907.48

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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.