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Finding the Fourth Proportional to 57,787.32, 86,676.66 and 20,851.32

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Solution

The fourth proportional to 57,787.32, 86,676.66 and 20,851.32 is: 31,275.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,787.32 : 86,676.66 = 20,851.32 : x
  2. Step 2: Convert to fraction form
    57,787.32/86,676.66 = 20,851.32/x
  3. Step 3: Cross multiply
    57,787.32x = 86,676.66 × 20,851.32
  4. Step 4: Simplify right side
    57,787.32x = 1,807,322,774.19
  5. Step 5: Solve for x
    x = 1,807,322,774.19/57,787.32
  6. Step 6: Final answer
    x = 31,275.42

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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.