Home / 80,172.81-120,223.67-42,725.90

Finding the Fourth Proportional to 80,172.81, 120,223.67 and 42,725.90

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Solution

The fourth proportional to 80,172.81, 120,223.67 and 42,725.90 is: 64,069.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,172.81 : 120,223.67 = 42,725.90 : x
  2. Step 2: Convert to fraction form
    80,172.81/120,223.67 = 42,725.90/x
  3. Step 3: Cross multiply
    80,172.81x = 120,223.67 × 42,725.90
  4. Step 4: Simplify right side
    80,172.81x = 5,136,664,588.98
  5. Step 5: Solve for x
    x = 5,136,664,588.98/80,172.81
  6. Step 6: Final answer
    x = 64,069.91

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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.