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Finding the Fourth Proportional to 102,995.20, 154,492.80 and 80,876.80

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Solution

The fourth proportional to 102,995.20, 154,492.80 and 80,876.80 is: 121,315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,995.20 : 154,492.80 = 80,876.80 : x
  2. Step 2: Convert to fraction form
    102,995.20/154,492.80 = 80,876.80/x
  3. Step 3: Cross multiply
    102,995.20x = 154,492.80 × 80,876.80
  4. Step 4: Simplify right side
    102,995.20x = 12,494,883,287.04
  5. Step 5: Solve for x
    x = 12,494,883,287.04/102,995.20
  6. Step 6: Final answer
    x = 121,315.20

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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.