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Finding the Fourth Proportional to 57,143.52, 78,853.68 and 31,989.60

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Solution

The fourth proportional to 57,143.52, 78,853.68 and 31,989.60 is: 44,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,143.52 : 78,853.68 = 31,989.60 : x
  2. Step 2: Convert to fraction form
    57,143.52/78,853.68 = 31,989.60/x
  3. Step 3: Cross multiply
    57,143.52x = 78,853.68 × 31,989.60
  4. Step 4: Simplify right side
    57,143.52x = 2,522,497,681.73
  5. Step 5: Solve for x
    x = 2,522,497,681.73/57,143.52
  6. Step 6: Final answer
    x = 44,143.20

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.