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Finding the Fourth Proportional to 55,167.60, 82,785.60 and 28,891.20

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Solution

The fourth proportional to 55,167.60, 82,785.60 and 28,891.20 is: 43,354.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,167.60 : 82,785.60 = 28,891.20 : x
  2. Step 2: Convert to fraction form
    55,167.60/82,785.60 = 28,891.20/x
  3. Step 3: Cross multiply
    55,167.60x = 82,785.60 × 28,891.20
  4. Step 4: Simplify right side
    55,167.60x = 2,391,775,326.72
  5. Step 5: Solve for x
    x = 2,391,775,326.72/55,167.60
  6. Step 6: Final answer
    x = 43,354.71

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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.