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Finding the Fourth Proportional to 121,002.50, 166,987.50 and 66,556.98

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Solution

The fourth proportional to 121,002.50, 166,987.50 and 66,556.98 is: 91,850.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,002.50 : 166,987.50 = 66,556.98 : x
  2. Step 2: Convert to fraction form
    121,002.50/166,987.50 = 66,556.98/x
  3. Step 3: Cross multiply
    121,002.50x = 166,987.50 × 66,556.98
  4. Step 4: Simplify right side
    121,002.50x = 11,114,183,697.75
  5. Step 5: Solve for x
    x = 11,114,183,697.75/121,002.50
  6. Step 6: Final answer
    x = 91,850.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.