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Finding the Fourth Proportional to 61,668.75, 92,503.14 and 20,115.75

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Solution

The fourth proportional to 61,668.75, 92,503.14 and 20,115.75 is: 30,173.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,668.75 : 92,503.14 = 20,115.75 : x
  2. Step 2: Convert to fraction form
    61,668.75/92,503.14 = 20,115.75/x
  3. Step 3: Cross multiply
    61,668.75x = 92,503.14 × 20,115.75
  4. Step 4: Simplify right side
    61,668.75x = 1,860,770,038.46
  5. Step 5: Solve for x
    x = 1,860,770,038.46/61,668.75
  6. Step 6: Final answer
    x = 30,173.63

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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.