Home / 129,637.20-194,455.80-80,964.30

Finding the Fourth Proportional to 129,637.20, 194,455.80 and 80,964.30

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Solution

The fourth proportional to 129,637.20, 194,455.80 and 80,964.30 is: 121,446.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,637.20 : 194,455.80 = 80,964.30 : x
  2. Step 2: Convert to fraction form
    129,637.20/194,455.80 = 80,964.30/x
  3. Step 3: Cross multiply
    129,637.20x = 194,455.80 × 80,964.30
  4. Step 4: Simplify right side
    129,637.20x = 15,743,977,727.94
  5. Step 5: Solve for x
    x = 15,743,977,727.94/129,637.20
  6. Step 6: Final answer
    x = 121,446.45

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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.