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Finding the Fourth Proportional to 57,584.55, 79,430.30 and 39,648.41

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Solution

The fourth proportional to 57,584.55, 79,430.30 and 39,648.41 is: 54,689.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,584.55 : 79,430.30 = 39,648.41 : x
  2. Step 2: Convert to fraction form
    57,584.55/79,430.30 = 39,648.41/x
  3. Step 3: Cross multiply
    57,584.55x = 79,430.30 × 39,648.41
  4. Step 4: Simplify right side
    57,584.55x = 3,149,284,703.67
  5. Step 5: Solve for x
    x = 3,149,284,703.67/57,584.55
  6. Step 6: Final answer
    x = 54,689.75

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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.