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Finding the Fourth Proportional to 123,896.70, 170,979.57 and 70,180.38

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Solution

The fourth proportional to 123,896.70, 170,979.57 and 70,180.38 is: 96,850.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,896.70 : 170,979.57 = 70,180.38 : x
  2. Step 2: Convert to fraction form
    123,896.70/170,979.57 = 70,180.38/x
  3. Step 3: Cross multiply
    123,896.70x = 170,979.57 × 70,180.38
  4. Step 4: Simplify right side
    123,896.70x = 11,999,411,194.84
  5. Step 5: Solve for x
    x = 11,999,411,194.84/123,896.70
  6. Step 6: Final answer
    x = 96,850.13

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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.