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Finding the Fourth Proportional to 129,874.60, 194,811.90 and 115,440.40

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Solution

The fourth proportional to 129,874.60, 194,811.90 and 115,440.40 is: 173,160.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,874.60 : 194,811.90 = 115,440.40 : x
  2. Step 2: Convert to fraction form
    129,874.60/194,811.90 = 115,440.40/x
  3. Step 3: Cross multiply
    129,874.60x = 194,811.90 × 115,440.40
  4. Step 4: Simplify right side
    129,874.60x = 22,489,163,660.76
  5. Step 5: Solve for x
    x = 22,489,163,660.76/129,874.60
  6. Step 6: Final answer
    x = 173,160.60

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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.