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Finding the Fourth Proportional to 129,900.80, 194,851.20 and 128,151.20

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Solution

The fourth proportional to 129,900.80, 194,851.20 and 128,151.20 is: 192,226.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,900.80 : 194,851.20 = 128,151.20 : x
  2. Step 2: Convert to fraction form
    129,900.80/194,851.20 = 128,151.20/x
  3. Step 3: Cross multiply
    129,900.80x = 194,851.20 × 128,151.20
  4. Step 4: Simplify right side
    129,900.80x = 24,970,415,101.44
  5. Step 5: Solve for x
    x = 24,970,415,101.44/129,900.80
  6. Step 6: Final answer
    x = 192,226.80

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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.