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Finding the Fourth Proportional to 123,386.94, 170,272.67 and 69,668.78

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Solution

The fourth proportional to 123,386.94, 170,272.67 and 69,668.78 is: 96,142.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,386.94 : 170,272.67 = 69,668.78 : x
  2. Step 2: Convert to fraction form
    123,386.94/170,272.67 = 69,668.78/x
  3. Step 3: Cross multiply
    123,386.94x = 170,272.67 × 69,668.78
  4. Step 4: Simplify right side
    123,386.94x = 11,862,687,986.54
  5. Step 5: Solve for x
    x = 11,862,687,986.54/123,386.94
  6. Step 6: Final answer
    x = 96,142.17

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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.