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Finding the Fourth Proportional to 120,720.80, 166,556.04 and 69,726.80

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Solution

The fourth proportional to 120,720.80, 166,556.04 and 69,726.80 is: 96,200.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,720.80 : 166,556.04 = 69,726.80 : x
  2. Step 2: Convert to fraction form
    120,720.80/166,556.04 = 69,726.80/x
  3. Step 3: Cross multiply
    120,720.80x = 166,556.04 × 69,726.80
  4. Step 4: Simplify right side
    120,720.80x = 11,613,419,689.87
  5. Step 5: Solve for x
    x = 11,613,419,689.87/120,720.80
  6. Step 6: Final answer
    x = 96,200.65

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1.5x scale

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.