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Finding the Fourth Proportional to 123,456.73, 170,384.12 and 69,745.21

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Solution

The fourth proportional to 123,456.73, 170,384.12 and 69,745.21 is: 96,256.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,456.73 : 170,384.12 = 69,745.21 : x
  2. Step 2: Convert to fraction form
    123,456.73/170,384.12 = 69,745.21/x
  3. Step 3: Cross multiply
    123,456.73x = 170,384.12 × 69,745.21
  4. Step 4: Simplify right side
    123,456.73x = 11,883,476,230.07
  5. Step 5: Solve for x
    x = 11,883,476,230.07/123,456.73
  6. Step 6: Final answer
    x = 96,256.20

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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.