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Finding the Fourth Proportional to 57,171.60, 79,029 and 47,684.88

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Solution

The fourth proportional to 57,171.60, 79,029 and 47,684.88 is: 65,915.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,171.60 : 79,029 = 47,684.88 : x
  2. Step 2: Convert to fraction form
    57,171.60/79,029 = 47,684.88/x
  3. Step 3: Cross multiply
    57,171.60x = 79,029 × 47,684.88
  4. Step 4: Simplify right side
    57,171.60x = 3,768,488,381.52
  5. Step 5: Solve for x
    x = 3,768,488,381.52/57,171.60
  6. Step 6: Final answer
    x = 65,915.39

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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.