Home / 82,738.80-123,962.40-67,867.20

Finding the Fourth Proportional to 82,738.80, 123,962.40 and 67,867.20

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Solution

The fourth proportional to 82,738.80, 123,962.40 and 67,867.20 is: 101,681.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,738.80 : 123,962.40 = 67,867.20 : x
  2. Step 2: Convert to fraction form
    82,738.80/123,962.40 = 67,867.20/x
  3. Step 3: Cross multiply
    82,738.80x = 123,962.40 × 67,867.20
  4. Step 4: Simplify right side
    82,738.80x = 8,412,980,993.28
  5. Step 5: Solve for x
    x = 8,412,980,993.28/82,738.80
  6. Step 6: Final answer
    x = 101,681.21

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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.