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Finding the Fourth Proportional to 80,992.80, 121,489.20 and 58,701.60

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Solution

The fourth proportional to 80,992.80, 121,489.20 and 58,701.60 is: 88,052.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,992.80 : 121,489.20 = 58,701.60 : x
  2. Step 2: Convert to fraction form
    80,992.80/121,489.20 = 58,701.60/x
  3. Step 3: Cross multiply
    80,992.80x = 121,489.20 × 58,701.60
  4. Step 4: Simplify right side
    80,992.80x = 7,131,610,422.72
  5. Step 5: Solve for x
    x = 7,131,610,422.72/80,992.80
  6. Step 6: Final answer
    x = 88,052.40

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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.