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Finding the Fourth Proportional to 123,578.69, 170,537.30 and 69,130.16

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Solution

The fourth proportional to 123,578.69, 170,537.30 and 69,130.16 is: 95,398.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,578.69 : 170,537.30 = 69,130.16 : x
  2. Step 2: Convert to fraction form
    123,578.69/170,537.30 = 69,130.16/x
  3. Step 3: Cross multiply
    123,578.69x = 170,537.30 × 69,130.16
  4. Step 4: Simplify right side
    123,578.69x = 11,789,269,636.63
  5. Step 5: Solve for x
    x = 11,789,269,636.63/123,578.69
  6. Step 6: Final answer
    x = 95,398.89

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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.