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Finding the Fourth Proportional to 57,067.64, 78,780.80 and 37,979.18

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Solution

The fourth proportional to 57,067.64, 78,780.80 and 37,979.18 is: 52,429.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,067.64 : 78,780.80 = 37,979.18 : x
  2. Step 2: Convert to fraction form
    57,067.64/78,780.80 = 37,979.18/x
  3. Step 3: Cross multiply
    57,067.64x = 78,780.80 × 37,979.18
  4. Step 4: Simplify right side
    57,067.64x = 2,992,030,180.22
  5. Step 5: Solve for x
    x = 2,992,030,180.22/57,067.64
  6. Step 6: Final answer
    x = 52,429.54

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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.