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Finding the Fourth Proportional to 57,818.55, 86,738.98 and 20,379.84

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Solution

The fourth proportional to 57,818.55, 86,738.98 and 20,379.84 is: 30,573.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,818.55 : 86,738.98 = 20,379.84 : x
  2. Step 2: Convert to fraction form
    57,818.55/86,738.98 = 20,379.84/x
  3. Step 3: Cross multiply
    57,818.55x = 86,738.98 × 20,379.84
  4. Step 4: Simplify right side
    57,818.55x = 1,767,726,534.16
  5. Step 5: Solve for x
    x = 1,767,726,534.16/57,818.55
  6. Step 6: Final answer
    x = 30,573.69

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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.