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Finding the Fourth Proportional to 57,754.26, 79,656.75 and 39,879.18

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Solution

The fourth proportional to 57,754.26, 79,656.75 and 39,879.18 is: 55,002.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,754.26 : 79,656.75 = 39,879.18 : x
  2. Step 2: Convert to fraction form
    57,754.26/79,656.75 = 39,879.18/x
  3. Step 3: Cross multiply
    57,754.26x = 79,656.75 × 39,879.18
  4. Step 4: Simplify right side
    57,754.26x = 3,176,645,871.47
  5. Step 5: Solve for x
    x = 3,176,645,871.47/57,754.26
  6. Step 6: Final answer
    x = 55,002.80

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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.