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Finding the Fourth Proportional to 104,080.80, 156,121.20 and 77,836.80

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Solution

The fourth proportional to 104,080.80, 156,121.20 and 77,836.80 is: 116,755.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,080.80 : 156,121.20 = 77,836.80 : x
  2. Step 2: Convert to fraction form
    104,080.80/156,121.20 = 77,836.80/x
  3. Step 3: Cross multiply
    104,080.80x = 156,121.20 × 77,836.80
  4. Step 4: Simplify right side
    104,080.80x = 12,151,974,620.16
  5. Step 5: Solve for x
    x = 12,151,974,620.16/104,080.80
  6. Step 6: Final answer
    x = 116,755.20

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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.