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Finding the Fourth Proportional to 252,028.80, 378,043.20 and 85,816.80

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Solution

The fourth proportional to 252,028.80, 378,043.20 and 85,816.80 is: 128,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,028.80 : 378,043.20 = 85,816.80 : x
  2. Step 2: Convert to fraction form
    252,028.80/378,043.20 = 85,816.80/x
  3. Step 3: Cross multiply
    252,028.80x = 378,043.20 × 85,816.80
  4. Step 4: Simplify right side
    252,028.80x = 32,442,457,685.76
  5. Step 5: Solve for x
    x = 32,442,457,685.76/252,028.80
  6. Step 6: Final answer
    x = 128,725.20

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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.