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Finding the Fourth Proportional to 57,580.74, 79,425.05 and 39,644.59

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Solution

The fourth proportional to 57,580.74, 79,425.05 and 39,644.59 is: 54,684.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,580.74 : 79,425.05 = 39,644.59 : x
  2. Step 2: Convert to fraction form
    57,580.74/79,425.05 = 39,644.59/x
  3. Step 3: Cross multiply
    57,580.74x = 79,425.05 × 39,644.59
  4. Step 4: Simplify right side
    57,580.74x = 3,148,773,542.98
  5. Step 5: Solve for x
    x = 3,148,773,542.98/57,580.74
  6. Step 6: Final answer
    x = 54,684.49

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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.