Home / 129,783.20-194,674.80-80,631.20

Finding the Fourth Proportional to 129,783.20, 194,674.80 and 80,631.20

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Solution

The fourth proportional to 129,783.20, 194,674.80 and 80,631.20 is: 120,946.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,783.20 : 194,674.80 = 80,631.20 : x
  2. Step 2: Convert to fraction form
    129,783.20/194,674.80 = 80,631.20/x
  3. Step 3: Cross multiply
    129,783.20x = 194,674.80 × 80,631.20
  4. Step 4: Simplify right side
    129,783.20x = 15,696,862,733.76
  5. Step 5: Solve for x
    x = 15,696,862,733.76/129,783.20
  6. Step 6: Final answer
    x = 120,946.80

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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.