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Finding the Fourth Proportional to 57,818.70, 86,730.45 and 18,374.70

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Solution

The fourth proportional to 57,818.70, 86,730.45 and 18,374.70 is: 27,562.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,818.70 : 86,730.45 = 18,374.70 : x
  2. Step 2: Convert to fraction form
    57,818.70/86,730.45 = 18,374.70/x
  3. Step 3: Cross multiply
    57,818.70x = 86,730.45 × 18,374.70
  4. Step 4: Simplify right side
    57,818.70x = 1,593,645,999.62
  5. Step 5: Solve for x
    x = 1,593,645,999.62/57,818.70
  6. Step 6: Final answer
    x = 27,562.81

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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.