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Finding the Fourth Proportional to 76,255.56, 114,381.72 and 20,851.56

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Solution

The fourth proportional to 76,255.56, 114,381.72 and 20,851.56 is: 31,276.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,255.56 : 114,381.72 = 20,851.56 : x
  2. Step 2: Convert to fraction form
    76,255.56/114,381.72 = 20,851.56/x
  3. Step 3: Cross multiply
    76,255.56x = 114,381.72 × 20,851.56
  4. Step 4: Simplify right side
    76,255.56x = 2,385,037,297.48
  5. Step 5: Solve for x
    x = 2,385,037,297.48/76,255.56
  6. Step 6: Final answer
    x = 31,276.90

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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.