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Finding the Fourth Proportional to 54,281.20, 81,486.60 and 30,607.60

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Solution

The fourth proportional to 54,281.20, 81,486.60 and 30,607.60 is: 45,947.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,281.20 : 81,486.60 = 30,607.60 : x
  2. Step 2: Convert to fraction form
    54,281.20/81,486.60 = 30,607.60/x
  3. Step 3: Cross multiply
    54,281.20x = 81,486.60 × 30,607.60
  4. Step 4: Simplify right side
    54,281.20x = 2,494,109,258.16
  5. Step 5: Solve for x
    x = 2,494,109,258.16/54,281.20
  6. Step 6: Final answer
    x = 45,947.94

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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.