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Finding the Fourth Proportional to 123,290.55, 170,149.95 and 69,580.26

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Solution

The fourth proportional to 123,290.55, 170,149.95 and 69,580.26 is: 96,025.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,290.55 : 170,149.95 = 69,580.26 : x
  2. Step 2: Convert to fraction form
    123,290.55/170,149.95 = 69,580.26/x
  3. Step 3: Cross multiply
    123,290.55x = 170,149.95 × 69,580.26
  4. Step 4: Simplify right side
    123,290.55x = 11,839,077,759.99
  5. Step 5: Solve for x
    x = 11,839,077,759.99/123,290.55
  6. Step 6: Final answer
    x = 96,025.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.