Home / 129,949.40-194,693.70-80,643.80

Finding the Fourth Proportional to 129,949.40, 194,693.70 and 80,643.80

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Solution

The fourth proportional to 129,949.40, 194,693.70 and 80,643.80 is: 120,822.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,949.40 : 194,693.70 = 80,643.80 : x
  2. Step 2: Convert to fraction form
    129,949.40/194,693.70 = 80,643.80/x
  3. Step 3: Cross multiply
    129,949.40x = 194,693.70 × 80,643.80
  4. Step 4: Simplify right side
    129,949.40x = 15,700,839,804.06
  5. Step 5: Solve for x
    x = 15,700,839,804.06/129,949.40
  6. Step 6: Final answer
    x = 120,822.72

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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.