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Finding the Fourth Proportional to 57,660, 79,502.64 and 40,667.04

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Solution

The fourth proportional to 57,660, 79,502.64 and 40,667.04 is: 56,072.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,660 : 79,502.64 = 40,667.04 : x
  2. Step 2: Convert to fraction form
    57,660/79,502.64 = 40,667.04/x
  3. Step 3: Cross multiply
    57,660x = 79,502.64 × 40,667.04
  4. Step 4: Simplify right side
    57,660x = 3,233,137,040.99
  5. Step 5: Solve for x
    x = 3,233,137,040.99/57,660
  6. Step 6: Final answer
    x = 56,072.44

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Why These Related Problems?

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