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Finding the Fourth Proportional to 121,556.40, 182,255.40 and 109,114.80

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Solution

The fourth proportional to 121,556.40, 182,255.40 and 109,114.80 is: 163,601.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,556.40 : 182,255.40 = 109,114.80 : x
  2. Step 2: Convert to fraction form
    121,556.40/182,255.40 = 109,114.80/x
  3. Step 3: Cross multiply
    121,556.40x = 182,255.40 × 109,114.80
  4. Step 4: Simplify right side
    121,556.40x = 19,886,761,519.92
  5. Step 5: Solve for x
    x = 19,886,761,519.92/121,556.40
  6. Step 6: Final answer
    x = 163,601.11

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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.