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Finding the Fourth Proportional to 123,858.16, 170,995.08 and 81,539.72

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Solution

The fourth proportional to 123,858.16, 170,995.08 and 81,539.72 is: 112,571.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,858.16 : 170,995.08 = 81,539.72 : x
  2. Step 2: Convert to fraction form
    123,858.16/170,995.08 = 81,539.72/x
  3. Step 3: Cross multiply
    123,858.16x = 170,995.08 × 81,539.72
  4. Step 4: Simplify right side
    123,858.16x = 13,942,890,944.58
  5. Step 5: Solve for x
    x = 13,942,890,944.58/123,858.16
  6. Step 6: Final answer
    x = 112,571.44

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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.