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Finding the Fourth Proportional to 123,576.38, 170,542.76 and 69,866.40

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Solution

The fourth proportional to 123,576.38, 170,542.76 and 69,866.40 is: 96,419.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,576.38 : 170,542.76 = 69,866.40 : x
  2. Step 2: Convert to fraction form
    123,576.38/170,542.76 = 69,866.40/x
  3. Step 3: Cross multiply
    123,576.38x = 170,542.76 × 69,866.40
  4. Step 4: Simplify right side
    123,576.38x = 11,915,208,687.26
  5. Step 5: Solve for x
    x = 11,915,208,687.26/123,576.38
  6. Step 6: Final answer
    x = 96,419.79

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1.5x scale

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.