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Finding the Fourth Proportional to 72,188.55, 108,288.59 and 21,583.86

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Solution

The fourth proportional to 72,188.55, 108,288.59 and 21,583.86 is: 32,377.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,188.55 : 108,288.59 = 21,583.86 : x
  2. Step 2: Convert to fraction form
    72,188.55/108,288.59 = 21,583.86/x
  3. Step 3: Cross multiply
    72,188.55x = 108,288.59 × 21,583.86
  4. Step 4: Simplify right side
    72,188.55x = 2,337,285,658.24
  5. Step 5: Solve for x
    x = 2,337,285,658.24/72,188.55
  6. Step 6: Final answer
    x = 32,377.51

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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.