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Finding the Fourth Proportional to 47,729.70, 71,623.80 and 19,663.20

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Solution

The fourth proportional to 47,729.70, 71,623.80 and 19,663.20 is: 29,506.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,729.70 : 71,623.80 = 19,663.20 : x
  2. Step 2: Convert to fraction form
    47,729.70/71,623.80 = 19,663.20/x
  3. Step 3: Cross multiply
    47,729.70x = 71,623.80 × 19,663.20
  4. Step 4: Simplify right side
    47,729.70x = 1,408,353,104.16
  5. Step 5: Solve for x
    x = 1,408,353,104.16/47,729.70
  6. Step 6: Final answer
    x = 29,506.85

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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.