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Finding the Fourth Proportional to 123,630.26, 170,536.66 and 78,918.26

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Solution

The fourth proportional to 123,630.26, 170,536.66 and 78,918.26 is: 108,860.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,630.26 : 170,536.66 = 78,918.26 : x
  2. Step 2: Convert to fraction form
    123,630.26/170,536.66 = 78,918.26/x
  3. Step 3: Cross multiply
    123,630.26x = 170,536.66 × 78,918.26
  4. Step 4: Simplify right side
    123,630.26x = 13,458,455,423.43
  5. Step 5: Solve for x
    x = 13,458,455,423.43/123,630.26
  6. Step 6: Final answer
    x = 108,860.53

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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.