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Finding the Fourth Proportional to 57,685.46, 79,575.09 and 39,789.32

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Solution

The fourth proportional to 57,685.46, 79,575.09 and 39,789.32 is: 54,887.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,685.46 : 79,575.09 = 39,789.32 : x
  2. Step 2: Convert to fraction form
    57,685.46/79,575.09 = 39,789.32/x
  3. Step 3: Cross multiply
    57,685.46x = 79,575.09 × 39,789.32
  4. Step 4: Simplify right side
    57,685.46x = 3,166,238,720.04
  5. Step 5: Solve for x
    x = 3,166,238,720.04/57,685.46
  6. Step 6: Final answer
    x = 54,887.99

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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.