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Finding the Fourth Proportional to 57,687.21, 79,577.51 and 39,791.07

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Solution

The fourth proportional to 57,687.21, 79,577.51 and 39,791.07 is: 54,890.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,687.21 : 79,577.51 = 39,791.07 : x
  2. Step 2: Convert to fraction form
    57,687.21/79,577.51 = 39,791.07/x
  3. Step 3: Cross multiply
    57,687.21x = 79,577.51 × 39,791.07
  4. Step 4: Simplify right side
    57,687.21x = 3,166,474,071.88
  5. Step 5: Solve for x
    x = 3,166,474,071.88/57,687.21
  6. Step 6: Final answer
    x = 54,890.40

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1.5x scale

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.