Home / 129,157.20-193,390.20-82,155.60

Finding the Fourth Proportional to 129,157.20, 193,390.20 and 82,155.60

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Solution

The fourth proportional to 129,157.20, 193,390.20 and 82,155.60 is: 123,013.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,157.20 : 193,390.20 = 82,155.60 : x
  2. Step 2: Convert to fraction form
    129,157.20/193,390.20 = 82,155.60/x
  3. Step 3: Cross multiply
    129,157.20x = 193,390.20 × 82,155.60
  4. Step 4: Simplify right side
    129,157.20x = 15,888,087,915.12
  5. Step 5: Solve for x
    x = 15,888,087,915.12/129,157.20
  6. Step 6: Final answer
    x = 123,013.57

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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.