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Finding the Fourth Proportional to 129,874.85, 194,812.28 and 103,630.85

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Solution

The fourth proportional to 129,874.85, 194,812.28 and 103,630.85 is: 155,446.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,874.85 : 194,812.28 = 103,630.85 : x
  2. Step 2: Convert to fraction form
    129,874.85/194,812.28 = 103,630.85/x
  3. Step 3: Cross multiply
    129,874.85x = 194,812.28 × 103,630.85
  4. Step 4: Simplify right side
    129,874.85x = 20,188,562,166.84
  5. Step 5: Solve for x
    x = 20,188,562,166.84/129,874.85
  6. Step 6: Final answer
    x = 155,446.28

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1.5x scale

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.