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Finding the Fourth Proportional to 54,905.31, 82,202.31 and 36,128.88

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Solution

The fourth proportional to 54,905.31, 82,202.31 and 36,128.88 is: 54,090.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,905.31 : 82,202.31 = 36,128.88 : x
  2. Step 2: Convert to fraction form
    54,905.31/82,202.31 = 36,128.88/x
  3. Step 3: Cross multiply
    54,905.31x = 82,202.31 × 36,128.88
  4. Step 4: Simplify right side
    54,905.31x = 2,969,877,393.71
  5. Step 5: Solve for x
    x = 2,969,877,393.71/54,905.31
  6. Step 6: Final answer
    x = 54,090.90

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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.