Home / 103,943.80-155,685.30-80,494.20

Finding the Fourth Proportional to 103,943.80, 155,685.30 and 80,494.20

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Solution

The fourth proportional to 103,943.80, 155,685.30 and 80,494.20 is: 120,562.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,943.80 : 155,685.30 = 80,494.20 : x
  2. Step 2: Convert to fraction form
    103,943.80/155,685.30 = 80,494.20/x
  3. Step 3: Cross multiply
    103,943.80x = 155,685.30 × 80,494.20
  4. Step 4: Simplify right side
    103,943.80x = 12,531,763,675.26
  5. Step 5: Solve for x
    x = 12,531,763,675.26/103,943.80
  6. Step 6: Final answer
    x = 120,562.88

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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.