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Finding the Fourth Proportional to 72,339.35, 108,512.06 and 19,748.88

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Solution

The fourth proportional to 72,339.35, 108,512.06 and 19,748.88 is: 29,624.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,339.35 : 108,512.06 = 19,748.88 : x
  2. Step 2: Convert to fraction form
    72,339.35/108,512.06 = 19,748.88/x
  3. Step 3: Cross multiply
    72,339.35x = 108,512.06 × 19,748.88
  4. Step 4: Simplify right side
    72,339.35x = 2,142,991,552.75
  5. Step 5: Solve for x
    x = 2,142,991,552.75/72,339.35
  6. Step 6: Final answer
    x = 29,624.15

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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.