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Finding the Fourth Proportional to 104,010.80, 155,785.80 and 90,186.80

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Solution

The fourth proportional to 104,010.80, 155,785.80 and 90,186.80 is: 135,080.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,010.80 : 155,785.80 = 90,186.80 : x
  2. Step 2: Convert to fraction form
    104,010.80/155,785.80 = 90,186.80/x
  3. Step 3: Cross multiply
    104,010.80x = 155,785.80 × 90,186.80
  4. Step 4: Simplify right side
    104,010.80x = 14,049,822,787.44
  5. Step 5: Solve for x
    x = 14,049,822,787.44/104,010.80
  6. Step 6: Final answer
    x = 135,080.42

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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.