Home / 80,120.81-120,172.03-20,962.19

Finding the Fourth Proportional to 80,120.81, 120,172.03 and 20,962.19

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Solution

The fourth proportional to 80,120.81, 120,172.03 and 20,962.19 is: 31,440.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,120.81 : 120,172.03 = 20,962.19 : x
  2. Step 2: Convert to fraction form
    80,120.81/120,172.03 = 20,962.19/x
  3. Step 3: Cross multiply
    80,120.81x = 120,172.03 × 20,962.19
  4. Step 4: Simplify right side
    80,120.81x = 2,519,068,925.55
  5. Step 5: Solve for x
    x = 2,519,068,925.55/80,120.81
  6. Step 6: Final answer
    x = 31,440.88

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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.