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Finding the Fourth Proportional to 80,995.20, 121,492.80 and 79,267.20

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Solution

The fourth proportional to 80,995.20, 121,492.80 and 79,267.20 is: 118,900.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,995.20 : 121,492.80 = 79,267.20 : x
  2. Step 2: Convert to fraction form
    80,995.20/121,492.80 = 79,267.20/x
  3. Step 3: Cross multiply
    80,995.20x = 121,492.80 × 79,267.20
  4. Step 4: Simplify right side
    80,995.20x = 9,630,394,076.16
  5. Step 5: Solve for x
    x = 9,630,394,076.16/80,995.20
  6. Step 6: Final answer
    x = 118,900.80

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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.