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Finding the Fourth Proportional to 104,416.70, 156,279.45 and 80,915.90

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Solution

The fourth proportional to 104,416.70, 156,279.45 and 80,915.90 is: 121,106.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,416.70 : 156,279.45 = 80,915.90 : x
  2. Step 2: Convert to fraction form
    104,416.70/156,279.45 = 80,915.90/x
  3. Step 3: Cross multiply
    104,416.70x = 156,279.45 × 80,915.90
  4. Step 4: Simplify right side
    104,416.70x = 12,645,492,348.26
  5. Step 5: Solve for x
    x = 12,645,492,348.26/104,416.70
  6. Step 6: Final answer
    x = 121,106.03

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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.