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Finding the Fourth Proportional to 57,918.68, 79,937.34 and 39,754.48

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Solution

The fourth proportional to 57,918.68, 79,937.34 and 39,754.48 is: 54,867.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,918.68 : 79,937.34 = 39,754.48 : x
  2. Step 2: Convert to fraction form
    57,918.68/79,937.34 = 39,754.48/x
  3. Step 3: Cross multiply
    57,918.68x = 79,937.34 × 39,754.48
  4. Step 4: Simplify right side
    57,918.68x = 3,177,867,184.44
  5. Step 5: Solve for x
    x = 3,177,867,184.44/57,918.68
  6. Step 6: Final answer
    x = 54,867.74

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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.