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Finding the Fourth Proportional to 57,319.60, 85,979.40 and 53,431.60

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Solution

The fourth proportional to 57,319.60, 85,979.40 and 53,431.60 is: 80,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,319.60 : 85,979.40 = 53,431.60 : x
  2. Step 2: Convert to fraction form
    57,319.60/85,979.40 = 53,431.60/x
  3. Step 3: Cross multiply
    57,319.60x = 85,979.40 × 53,431.60
  4. Step 4: Simplify right side
    57,319.60x = 4,594,016,909.04
  5. Step 5: Solve for x
    x = 4,594,016,909.04/57,319.60
  6. Step 6: Final answer
    x = 80,147.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.