Home / 123,372.90-185,115.68-67,128.66

Finding the Fourth Proportional to 123,372.90, 185,115.68 and 67,128.66

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Solution

The fourth proportional to 123,372.90, 185,115.68 and 67,128.66 is: 100,723.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,372.90 : 185,115.68 = 67,128.66 : x
  2. Step 2: Convert to fraction form
    123,372.90/185,115.68 = 67,128.66/x
  3. Step 3: Cross multiply
    123,372.90x = 185,115.68 × 67,128.66
  4. Step 4: Simplify right side
    123,372.90x = 12,426,567,543.39
  5. Step 5: Solve for x
    x = 12,426,567,543.39/123,372.90
  6. Step 6: Final answer
    x = 100,723.64

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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.