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Finding the Fourth Proportional to 129,630.70, 194,446.05 and 40,911.40

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Solution

The fourth proportional to 129,630.70, 194,446.05 and 40,911.40 is: 61,367.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,630.70 : 194,446.05 = 40,911.40 : x
  2. Step 2: Convert to fraction form
    129,630.70/194,446.05 = 40,911.40/x
  3. Step 3: Cross multiply
    129,630.70x = 194,446.05 × 40,911.40
  4. Step 4: Simplify right side
    129,630.70x = 7,955,060,129.97
  5. Step 5: Solve for x
    x = 7,955,060,129.97/129,630.70
  6. Step 6: Final answer
    x = 61,367.10

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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.