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Finding the Fourth Proportional to 123,229.49, 170,056.55 and 66,640.87

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Solution

The fourth proportional to 123,229.49, 170,056.55 and 66,640.87 is: 91,964.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,229.49 : 170,056.55 = 66,640.87 : x
  2. Step 2: Convert to fraction form
    123,229.49/170,056.55 = 66,640.87/x
  3. Step 3: Cross multiply
    123,229.49x = 170,056.55 × 66,640.87
  4. Step 4: Simplify right side
    123,229.49x = 11,332,716,182.66
  5. Step 5: Solve for x
    x = 11,332,716,182.66/123,229.49
  6. Step 6: Final answer
    x = 91,964.32

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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.