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Finding the Fourth Proportional to 57,905.30, 86,906.55 and 28,348.40

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Solution

The fourth proportional to 57,905.30, 86,906.55 and 28,348.40 is: 42,546.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,905.30 : 86,906.55 = 28,348.40 : x
  2. Step 2: Convert to fraction form
    57,905.30/86,906.55 = 28,348.40/x
  3. Step 3: Cross multiply
    57,905.30x = 86,906.55 × 28,348.40
  4. Step 4: Simplify right side
    57,905.30x = 2,463,661,642.02
  5. Step 5: Solve for x
    x = 2,463,661,642.02/57,905.30
  6. Step 6: Final answer
    x = 42,546.39

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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.