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Finding the Fourth Proportional to 54,195.60, 81,188.20 and 39,938.21

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Solution

The fourth proportional to 54,195.60, 81,188.20 and 39,938.21 is: 59,829.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,195.60 : 81,188.20 = 39,938.21 : x
  2. Step 2: Convert to fraction form
    54,195.60/81,188.20 = 39,938.21/x
  3. Step 3: Cross multiply
    54,195.60x = 81,188.20 × 39,938.21
  4. Step 4: Simplify right side
    54,195.60x = 3,242,510,775.49
  5. Step 5: Solve for x
    x = 3,242,510,775.49/54,195.60
  6. Step 6: Final answer
    x = 59,829.78

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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.