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Finding the Fourth Proportional to 57,478.92, 86,187.60 and 25,428.84

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Solution

The fourth proportional to 57,478.92, 86,187.60 and 25,428.84 is: 38,129.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,478.92 : 86,187.60 = 25,428.84 : x
  2. Step 2: Convert to fraction form
    57,478.92/86,187.60 = 25,428.84/x
  3. Step 3: Cross multiply
    57,478.92x = 86,187.60 × 25,428.84
  4. Step 4: Simplify right side
    57,478.92x = 2,191,650,690.38
  5. Step 5: Solve for x
    x = 2,191,650,690.38/57,478.92
  6. Step 6: Final answer
    x = 38,129.64

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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.