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Finding the Fourth Proportional to 57,842.66, 86,770.37 and 18,390.55

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Solution

The fourth proportional to 57,842.66, 86,770.37 and 18,390.55 is: 27,587.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,842.66 : 86,770.37 = 18,390.55 : x
  2. Step 2: Convert to fraction form
    57,842.66/86,770.37 = 18,390.55/x
  3. Step 3: Cross multiply
    57,842.66x = 86,770.37 × 18,390.55
  4. Step 4: Simplify right side
    57,842.66x = 1,595,754,819.75
  5. Step 5: Solve for x
    x = 1,595,754,819.75/57,842.66
  6. Step 6: Final answer
    x = 27,587.85

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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.