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Finding the Fourth Proportional to 57,399.64, 86,113.32 and 19,954.28

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Solution

The fourth proportional to 57,399.64, 86,113.32 and 19,954.28 is: 29,936.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,399.64 : 86,113.32 = 19,954.28 : x
  2. Step 2: Convert to fraction form
    57,399.64/86,113.32 = 19,954.28/x
  3. Step 3: Cross multiply
    57,399.64x = 86,113.32 × 19,954.28
  4. Step 4: Simplify right side
    57,399.64x = 1,718,329,299.01
  5. Step 5: Solve for x
    x = 1,718,329,299.01/57,399.64
  6. Step 6: Final answer
    x = 29,936.24

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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.