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Finding the Fourth Proportional to 61,638.80, 92,458.20 and 51,270.80

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Solution

The fourth proportional to 61,638.80, 92,458.20 and 51,270.80 is: 76,906.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,638.80 : 92,458.20 = 51,270.80 : x
  2. Step 2: Convert to fraction form
    61,638.80/92,458.20 = 51,270.80/x
  3. Step 3: Cross multiply
    61,638.80x = 92,458.20 × 51,270.80
  4. Step 4: Simplify right side
    61,638.80x = 4,740,405,880.56
  5. Step 5: Solve for x
    x = 4,740,405,880.56/61,638.80
  6. Step 6: Final answer
    x = 76,906.20

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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.