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Finding the Fourth Proportional to 76,132.80, 114,199.20 and 20,728.80

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Solution

The fourth proportional to 76,132.80, 114,199.20 and 20,728.80 is: 31,093.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,132.80 : 114,199.20 = 20,728.80 : x
  2. Step 2: Convert to fraction form
    76,132.80/114,199.20 = 20,728.80/x
  3. Step 3: Cross multiply
    76,132.80x = 114,199.20 × 20,728.80
  4. Step 4: Simplify right side
    76,132.80x = 2,367,212,376.96
  5. Step 5: Solve for x
    x = 2,367,212,376.96/76,132.80
  6. Step 6: Final answer
    x = 31,093.20

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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.