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Finding the Fourth Proportional to 123,711.78, 170,722.26 and 69,995.64

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Solution

The fourth proportional to 123,711.78, 170,722.26 and 69,995.64 is: 96,593.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,711.78 : 170,722.26 = 69,995.64 : x
  2. Step 2: Convert to fraction form
    123,711.78/170,722.26 = 69,995.64/x
  3. Step 3: Cross multiply
    123,711.78x = 170,722.26 × 69,995.64
  4. Step 4: Simplify right side
    123,711.78x = 11,949,813,850.95
  5. Step 5: Solve for x
    x = 11,949,813,850.95/123,711.78
  6. Step 6: Final answer
    x = 96,593.99

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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.