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Finding the Fourth Proportional to 123,872.70, 171,015.26 and 81,554.25

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Solution

The fourth proportional to 123,872.70, 171,015.26 and 81,554.25 is: 112,591.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,872.70 : 171,015.26 = 81,554.25 : x
  2. Step 2: Convert to fraction form
    123,872.70/171,015.26 = 81,554.25/x
  3. Step 3: Cross multiply
    123,872.70x = 171,015.26 × 81,554.25
  4. Step 4: Simplify right side
    123,872.70x = 13,947,020,860.08
  5. Step 5: Solve for x
    x = 13,947,020,860.08/123,872.70
  6. Step 6: Final answer
    x = 112,591.56

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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.