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Finding the Fourth Proportional to 53,712.60, 80,585.10 and 28,764.60

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Solution

The fourth proportional to 53,712.60, 80,585.10 and 28,764.60 is: 43,155.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,712.60 : 80,585.10 = 28,764.60 : x
  2. Step 2: Convert to fraction form
    53,712.60/80,585.10 = 28,764.60/x
  3. Step 3: Cross multiply
    53,712.60x = 80,585.10 × 28,764.60
  4. Step 4: Simplify right side
    53,712.60x = 2,317,998,167.46
  5. Step 5: Solve for x
    x = 2,317,998,167.46/53,712.60
  6. Step 6: Final answer
    x = 43,155.58

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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.