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Finding the Fourth Proportional to 61,819.60, 92,729.40 and 15,072.88

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Solution

The fourth proportional to 61,819.60, 92,729.40 and 15,072.88 is: 22,609.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,819.60 : 92,729.40 = 15,072.88 : x
  2. Step 2: Convert to fraction form
    61,819.60/92,729.40 = 15,072.88/x
  3. Step 3: Cross multiply
    61,819.60x = 92,729.40 × 15,072.88
  4. Step 4: Simplify right side
    61,819.60x = 1,397,699,118.67
  5. Step 5: Solve for x
    x = 1,397,699,118.67/61,819.60
  6. Step 6: Final answer
    x = 22,609.32

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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.