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Finding the Fourth Proportional to 104,076.80, 155,884.80 and 85,644.80

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Solution

The fourth proportional to 104,076.80, 155,884.80 and 85,644.80 is: 128,277.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,076.80 : 155,884.80 = 85,644.80 : x
  2. Step 2: Convert to fraction form
    104,076.80/155,884.80 = 85,644.80/x
  3. Step 3: Cross multiply
    104,076.80x = 155,884.80 × 85,644.80
  4. Step 4: Simplify right side
    104,076.80x = 13,350,722,519.04
  5. Step 5: Solve for x
    x = 13,350,722,519.04/104,076.80
  6. Step 6: Final answer
    x = 128,277.60

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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.