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Finding the Fourth Proportional to 57,718.73, 86,583.03 and 20,275.54

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Solution

The fourth proportional to 57,718.73, 86,583.03 and 20,275.54 is: 30,415.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,718.73 : 86,583.03 = 20,275.54 : x
  2. Step 2: Convert to fraction form
    57,718.73/86,583.03 = 20,275.54/x
  3. Step 3: Cross multiply
    57,718.73x = 86,583.03 × 20,275.54
  4. Step 4: Simplify right side
    57,718.73x = 1,755,517,639.11
  5. Step 5: Solve for x
    x = 1,755,517,639.11/57,718.73
  6. Step 6: Final answer
    x = 30,415.04

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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.