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Finding the Fourth Proportional to 54,378.60, 81,597.62 and 21,099.97

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Solution

The fourth proportional to 54,378.60, 81,597.62 and 21,099.97 is: 31,661.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,378.60 : 81,597.62 = 21,099.97 : x
  2. Step 2: Convert to fraction form
    54,378.60/81,597.62 = 21,099.97/x
  3. Step 3: Cross multiply
    54,378.60x = 81,597.62 × 21,099.97
  4. Step 4: Simplify right side
    54,378.60x = 1,721,707,334.07
  5. Step 5: Solve for x
    x = 1,721,707,334.07/54,378.60
  6. Step 6: Final answer
    x = 31,661.49

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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.