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Finding the Fourth Proportional to 81,160.90, 121,777.80 and 36,764.80

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Solution

The fourth proportional to 81,160.90, 121,777.80 and 36,764.80 is: 55,163.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,160.90 : 121,777.80 = 36,764.80 : x
  2. Step 2: Convert to fraction form
    81,160.90/121,777.80 = 36,764.80/x
  3. Step 3: Cross multiply
    81,160.90x = 121,777.80 × 36,764.80
  4. Step 4: Simplify right side
    81,160.90x = 4,477,136,461.44
  5. Step 5: Solve for x
    x = 4,477,136,461.44/81,160.90
  6. Step 6: Final answer
    x = 55,163.71

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1.5x scale

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.