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Finding the Fourth Proportional to 57,685.71, 79,575.44 and 39,789.57

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Solution

The fourth proportional to 57,685.71, 79,575.44 and 39,789.57 is: 54,888.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,685.71 : 79,575.44 = 39,789.57 : x
  2. Step 2: Convert to fraction form
    57,685.71/79,575.44 = 39,789.57/x
  3. Step 3: Cross multiply
    57,685.71x = 79,575.44 × 39,789.57
  4. Step 4: Simplify right side
    57,685.71x = 3,166,272,341.21
  5. Step 5: Solve for x
    x = 3,166,272,341.21/57,685.71
  6. Step 6: Final answer
    x = 54,888.33

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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.