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Finding the Fourth Proportional to 123,101.34, 169,879.80 and 66,512.70

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Solution

The fourth proportional to 123,101.34, 169,879.80 and 66,512.70 is: 91,787.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,101.34 : 169,879.80 = 66,512.70 : x
  2. Step 2: Convert to fraction form
    123,101.34/169,879.80 = 66,512.70/x
  3. Step 3: Cross multiply
    123,101.34x = 169,879.80 × 66,512.70
  4. Step 4: Simplify right side
    123,101.34x = 11,299,164,173.46
  5. Step 5: Solve for x
    x = 11,299,164,173.46/123,101.34
  6. Step 6: Final answer
    x = 91,787.50

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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.